look up any word, like daquan:

1 definition by AdderFadder

 
1.
NBD
Never Back Down

A phrase commonly used to encourage a friend to do something crazy or gutsy.
Guy: Yo you should totally ask her out right now.

Friend: No way man I don't even kn-

Guy: NBD! Do it!
by AdderFadder September 03, 2010
9 33