Abbreviation for "Good look up face". It is used when describing how a person, the "blower" if you will, looks when making eye contact during the act of fellatio.
"Mike's mom is hot and she has a helluva GLUF"
by Hurricane Mickey July 21, 2008
Can you define these popular missing words?
bad luck that turns to good luck on and off repetitively.
For the tests i had gluf.
by FanNerd December 12, 2015