A nickname for any male who likes Lady Gaga, or any male artist who opens for her.
Simpson: Dude! Did you see Lady Gaga's outfit at the Grammys last night? She looked fabulous!

Dude: Sorry, Lord GooGoo -- I must've missed that. Did she borrow Bjork's swan dress for the evening?
by whiteboyDJ December 4, 2010
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