look up any word, like cunt:
 
1.
a reference to a girl who you have a relationship with, but you don't really care about her
aw man, ummm... whats-her-nuts was great last night.
by pigeonkiller5000 March 12, 2006
 
2.
When you don't know a persons name, instead of saying "what's her name" you say "what's her nuts"
So I was talking to whats her nuts.

Also:
What's her/his titties
What's her/his fuck
by Lathey August 20, 2006