Language / Polish slang phrases - most popular. [606]

Hi!

I work in a Dutch factory with a lot of nice Polish people.
Since a few months i learned a few words and i'm trying to learn some more though a iPhone study app. I have to say, it's not an easy language ;)

Next week on saturday we have a big company bbq for all workers.
I want to design a t-shirt for this bbq with a funny Polish text on it.
Maybe something to do with work, a party or some common polish wordjoke.

I was hoping someone please give me a suggestion? With the translation if possible...
Thanks in advance!
Greetz,

Tijmen