look up any word, like donkey punch:
At least two meanings, in order of popularity:
1) Get fresh stay fresh (one woman to another re feminine hygiene)

2) Gay friend/straight friend (wrt bisexual/ambiguously gay friend)
1) "LYLAS, but sheesh, gfsf!"

2) "I like you, but I'm so confused, gfsf."
by Gulligan April 27, 2011