To be essentially fucking with
someone or to be condescending to someone by implying that they are stupid.
Refers to when someone says "Don't
piss in my
pocket and tell me its raining, jerky..."
Tom: "Thanks for the CD, I
like rap
music.."
Sue: "Are you taking a
piss?"
Tom: "No, not at all. I really do like this CD. Thanks
a bunch...really."