Top Definition
(WHACK-shun) Yet another synonym for masturbation.
"Did you pick up last night mate?"
"Nah, I went home for a bit of whaction instead."
by Eerbone August 07, 2007
2 more definitions
(WHACK-shun) Yet another synonym for masturbation.
"Did you pick up last night mate?"
"Nah, I went home for a bit of whaction instead."
by Eerbone August 07, 2007
Similar to 'action', the process of doing something, with the onomatopoeic twist of 'whack'.

Meaning: Vigorous action
"Check that whaction!"
by mer55 September 02, 2006

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