It's the same thing as pussy eating. It's the act of taking your tongue and licking a woman's vagina.
Friend #1 What's got you smiling like that?
Friend #2 My man came over this morning and gave me the best pussy licking ever!
Friend #1 oh, you too?!
Friend #2 Bitch what you mean you too??
Friend #1 I mean your man came over last night and licked my pussy...didn't you know...