Taken from the character Quagmire, on the family guy t.v series, the word literally means; "hunting" "prowling"
or "out for pussy"
"hey michael, lets go quagging"
"hang on, gotta get my quag glasses"
The sound which eminates from the throat of someone administering a very rough blowjob or is having their face fucked. Often exaggereated to add effect.
Amber started quagging after Mike grabbed the back of her head and started jamming his cock in her mouth.