Usually used to describe an act of sexual lewdness where cum gets sprayed on a pair of Lady Gaga sunglasses(can also apply with other sunglasses)
2 Males in a 69 positon fingering each other and performing fellatio and the dominate male pulls out during orgasm and sprays the receiving male's Lady Gaga sunglasses that were worn during the act.
Phil totally fell out of the closet last night with 2 fingers in his hungry ass and cum on his Lady Gaga sunglasses.
He totally got Lady Gaga'd!
When you are getting a blowjob and when you are about to cum, you slap the girl/boy round the face with some bacon.
mate i lady GAGA'd this girl last night