Help Me Prank My Housemate!

[Fish Eat Fish]

I figured out that my housemate has been using my shampoo. Not a real bank breaker but since he doesnt mind using my stuff I figure a pank is in order. I want to swap out the shampoo for something else gross or funny. He cant get mad because he shouldnt be using it anyways.

So I need ideas of what I could put in there. I would like it to be greenish in color and shampoo in consistency so that he actually applies it to his hair.

Ideas I have had:
Nair - Im not sure im upset enough about this to justify this sort of prank
mayonnaise - I was informed that this is actually good for your hair
toothpaste - not that exciting but with a little water would be the right consistency

thats about it so far. I plan to do it tonight before he gets smart and buys his own shampoo

 

[Angler]

How about something that smells real bad

 

[Lissaspence]

Some green temporary dye would be fun. Not as extream as nair but would still leave an effect for a while.

 

[jcardona1]

mayo, cooking oil, toothpaste, and some ranch dressing should get a nice reaction out of him

 

[Gr8KarmaSF]

Cooking Oil

 

[princess]

I put nair in my dads when i was 13 and peed off lol my mum now fills him shampoo with femfresh ( because we got like 10 bottles from my gran when she raided the bloody avon woman ) haha not that it would do anything it's just funny.....

hmmmmm I use mayo on my hair anyway, makes it shiney so that wouldn't work. how about wasabi? smells pretty bad though, but would be funny if he got it in his eyes

you guys have spray cheese stuff? that would be fun or fish paste

 

[Fish Eat Fish]

I put nair in my dads when i was 13 and peed off lol my mum now fills him shampoo with femfresh ( because we got like 10 bottles from my gran when she raided the bloody avon woman ) haha not that it would do anything it's just funny.....

hmmmmm I use mayo on my hair anyway, makes it shiney so that wouldn't work. how about wasabi? smells pretty bad though, but would be funny if he got it in his eyes

you are evil!

 

[Fish Eat Fish]

Some green temporary dye would be fun. Not as extream as nair but would still leave an effect for a while.

But would it work in the shower? I thought it had to sit awhile

mayo, cooking oil, toothpaste, and some ranch dressing should get a nice reaction out of him

Cooking Oil

these have some potential

 

[kdrun76]

how about a freally fruity smelling perfume, just mix it in with the shampoo.... make him smell like a fruit.

 

[princess]

hair dye wouldn't work and the permanant stuff is dangerous so i would vote against it, temp stuff would just wash stright off and its smells really nice. what about putting something in the shampoo like worms or crickets, live crickets lol