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To Masturbate, and consequently ejaculate, in the shower while taking a shower.
Usually done in secret, to avoid detection of masturbatory behavior by others.
"I wouldn't go in that bathroom if I were you."
"Why not? It's dirty?"
"Timmy was in the shower forever...he was probably coca-blasting all over the place!"
by Beau54 February 09, 2009
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2
The act of masturbating in the shower. Then when about to ejaculate does so on the tub floor, shower knobs, and if possible the shower head.
What the fuck is taking Timmy so long in the shower?

Oh, he's coca-blasting.

Does he do that often?

Does a bear shit in the woods?
by Debroah Morgan January 17, 2010
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