Steal his pet while he's away Keep it in your freezer Help him search for the pet, as long as it takes Make signs and all that jazz Wait until he forgets, moves on. A year or two down the road. Make him stew or tacos or soup, ot doesnt matter really, just a meat dish for dinner or lunch sometime. Substitute the meat for his pet Tell him midway, after he says how delicious it is Show him the rest when he doesn't believe you Stab through the heart and use him as your next stew for his parents when they go looking for him and you repeat the process

Take all his shirts and have the right sleeve hemmed one inch shorter than the left...

Do you want to keep him as a friend after the prank?

Jizz in his mayo Or make him ingest your jizz in some way

Piss or jack-off in his mouth while he's sleeping.

Hook up his water supply to a barrel of spit

Soak his toothbrush in liquid pepper, like Insanity sauce....also hit some of his food, something he drinks and mouthwash if he uses it. Hit him with that sh*t randomly for a week - he will get the point. I had a roommate in the Army that tried to prank me all the time....two weeks of Insanity sauce treatment was enough for him to call a truce. I was relentless with it and used the entire bottle....nothing was safe, he told me later that he was so paranoid in our room that he wanted to request a move. He had a hard time pooping for a week after the 'treatment'. Never had to deal with his sh*t again.

At least it was just on it and not in it.

I will think you up something.... I just need time