What is Dirty Hippo?
1.
Sexual innuendo.
When a man takes a shit, doesn't wipe and proceeds to sit on a womans face while she cleans him off.
"I love it when she asks me to give her a dirty hippo."
2.
Alongside with
Girl: OMG CHECK OUT MY FITTY CENT RINGTONE!!! *dun, du-*
Guy: *Bashes phone on ground* Shut up, goddamnit.