I searched for Lady Gaga on urbandictionary...
1. Lady GaGa
Lady GaGa is a unicorn in a man suit.
I will explain.
Only unicorns can get away with wearing such glittery, weird clothes. And, since unicorns have no gender (they reproduce through rainbows.), she/he would have stood out in human society, therefore he/she chose a man suit to fit in.
Example:
Human A) OMC, that person just doesn't fit in. It's something about them... A magical air...
Human B) Oh, yeh, that's Lady GaGa. It's not a person at all, it's a unicorn.

and also..
2. Lady Gaga
A pop star who you wouldn't recognize if you saw her as her body morphs into a different image every day.
Person 1: Hey isn't that Lady Gaga over there?
Person 2: I don't know, she looks different in every picture I've ever seen of her.
Person 1: Oh, well maybe she'll get a role in the new Transformers movie.
It's funny to see the vision of some people towards Gaga
