look up any word, like bae:
 
1.
When you have no idea what someone is asking you you should reply with this
girl: what time do you get off work?
guy: Fuck if I know
by OG March 31, 2004
224 64
 
2.
if you dont know what someone is talking about then this comes in handy.
hey whats the answer to this problem

fuck if i know
by mike October 07, 2003
75 20