-noun

1. the female who gives you the best head; not necessarily the one who you’re with or who you love the most, or even who is the best in bed- just the one who gives the best fellatio.
Who Sally? Oh, she ain’t my girl, she ain't even ride dat dick too good- she just a fool wit them lips nigga. She’s my main brain.
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Similar to drain the main vain, however as we all know, cum is stored in the brain.
Timmy: “Hey Billy, what were you doing in the toilet last night? Sounded like you were role playing a rapidly declining dragon trying to climb a jagged rock!”
Billy: “ah sorry about that, had to drain the main brain
Timmy: “lucky bastard!”
by lonely_cowboy69 April 5, 2023
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