The act of masterbating during the intermission of Call of Duty, usually immediatly after an intense match.
My hoe of a girlfriend didn't get her pussy ass over here so now i have to play the mastermission instead of getting head.
by OG Mudbone's father March 17, 2011
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The stimulation of ones own bass guitar, especially slapping, which results in immediate pleasure and self-gratification. Depending on the length and intensity of masterbassion, pain and/or blisters may develop.
The stimulation of ones own bass guitar, especially slapping, which results in immediate pleasure and self-gratification. Depending on the length and intensity of masterbassion, pain and/or blisters may develop.
Idle hands lead to masterbassion.
by Glason j Laausser March 26, 2010
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