I have a 6mo cat and for some time, I don't have a clue how to deal with one behaviour of his - sometimes he's walking casually among the people in the house and suddenly an idea to bite pops into his head. And once it does, good riddance telling him to stop.
Example situation: cat is walking somewhere around the sofa where I'm sitting. I pet him a few times, he's still walking near and BAM, suddenly he comes to my hand and starts biting in (and I don't mean a playful "hey whatcha doing there mate" bite; I mean a fully-fledged bite with all the paws around your hand so that if you raise you arm, you'll raise it with the cat dug into it). I drive him away - he'll come back right away. I put him down on the floor - he'll come to my leg and start biting into that. I've tried putting him on the ground and telling him a firm "No!", telling the "no" along with his name, I've tried lightly slapping his tail or paw along with a firm "No!" - to no avail. I slap him, tell him "No!", put him away, he lays his ears flat along his head to the back and (sometimes with a meow or loud inhale, sometimes without making a sound) attacks the nearest thing, be it my leg, arm, hand or whatever, and bites it to the blood.
How am I supposed to react, then? The only thing I've found to be working so far is to put him in the bathroom and close the door or in his carrier and wait till he cools down cause with the whole: his bite->my slap and "No!"->his next attack shtick we could probably be "dancing" till the morning comes and nothing would come out of it (apart from my body looking like I just fought a shark and a bear simultaneously and his paw being sore from the slaps...) so it's not really the way to go. What do you suggest?
Example situation: cat is walking somewhere around the sofa where I'm sitting. I pet him a few times, he's still walking near and BAM, suddenly he comes to my hand and starts biting in (and I don't mean a playful "hey whatcha doing there mate" bite; I mean a fully-fledged bite with all the paws around your hand so that if you raise you arm, you'll raise it with the cat dug into it). I drive him away - he'll come back right away. I put him down on the floor - he'll come to my leg and start biting into that. I've tried putting him on the ground and telling him a firm "No!", telling the "no" along with his name, I've tried lightly slapping his tail or paw along with a firm "No!" - to no avail. I slap him, tell him "No!", put him away, he lays his ears flat along his head to the back and (sometimes with a meow or loud inhale, sometimes without making a sound) attacks the nearest thing, be it my leg, arm, hand or whatever, and bites it to the blood.
How am I supposed to react, then? The only thing I've found to be working so far is to put him in the bathroom and close the door or in his carrier and wait till he cools down cause with the whole: his bite->my slap and "No!"->his next attack shtick we could probably be "dancing" till the morning comes and nothing would come out of it (apart from my body looking like I just fought a shark and a bear simultaneously and his paw being sore from the slaps...) so it's not really the way to go. What do you suggest?
at the lemon juice .... it beats my kitty bowling method.... which by the way I only did once when our semi feral full on attacked me. (He bit me hard enough to draw blood and all 4 claws dug into my arm.) After that we kinda had a I'll ignore you/you'll ignore me relationship for a couple of months. Then we built our relationship back up. I do watch his body language though. If he gives me a little nip, I give him a little/light two finger tap on his head. However since then he has been gentler with me. I have no idea why he suddenly attacked me like that but he only did it the one time. In your case I would suggest carrying a kick-able toy & a small squirt bottle with you at all times. If he attacks you, you squirt him and chase him away. In the mean time try playing with him more to drain his energy. Hopefully you will only need the squirt bottle for a week or two. Hopefully you will learn his body language well enough to see him getting ready to bite you & you can toss a toy and get him to attack that instead. A small beanie baby with 2-4 yards of ribbon tied securely to it might work to. That way you can toss it and then drag it/have it move like live prey. It might be worth trying if he doesn't take instantly to a kickaroo. 
Also you can try a penny can instead of a squirt bottle if you like.
