Top definition
To WUB FAP means to be overly excited over dub step music it causes you to wank consistently in time with the music.
"Dude this music hits the spot! I love this so much! I'm going to WUB FAP this!"

or

(in a night club)
"IM WUB FAPPING THE SHIT OUT OF THIS MUSIC!!"
by Lilly&Claire October 26, 2011
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