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1.
Someone who goes to another persons house, uses their toilet, leaves a poo in their toilet and doesn't flush.

Next person finds the poo floating in the toilet.
Who went for a dump and forgot to flush the toilet?

The Pooligan did.
by Caps40 May 01, 2009
 
2.
A hooligan in a pool, probably public.
Jax: Did you have fun at the pool with your brother?

Em: Pfft, I bunch of pooligans picked him up and threw him off the diving board.

Jax: ...So, did you have fun?
by Reproach May 05, 2009