The state of a penis between a semi and a full blown erection.
I was so drunk, she had to make do with my gibbous
by rich wazza March 9, 2007
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A phase of the moon in which it is more than half full, but not entirely full.
The waxing of the gibbous moon bathed the courtyard in a kind of cold starlight.
by Excel November 15, 2003
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Slang term originating in Newcastle-Upon-Tyne in the late 2010s, meaning cool or fun. Also refers to a stage in the moon cycle.
"Huh, last night was gibbous, we should go there again some time!"
by MoonMoon37 April 28, 2018
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to be of scandal; when you're showing a lot but not too much; being provocative; classy yet trashy
Look at that gibbous bitch over there.

This lace makes me feel a little gibbous...
by cristozombie March 3, 2015
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(puff)
Cough cough! Shit, this weed got me gibbous dude!
by L Wrong Hubbard June 20, 2006
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To perform fellatio during one's period. Used especially if the period falls between the first half and full moon phases.
Dude, when I get home, my girlfriend is going to wax my gibbous.
by Nyarlathotep February 19, 2004
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The name used to call a certain Finley courtier when he gets loud. Can be used in conjunction with ‘your fat’ or ‘fucking whale’ for maximum effect.
Beck: hey fin wattup u waxing gibbous

Fin: hey that’s so mean I only gained 25kg over lockdown what the hell man
by wittybanter1239 September 21, 2020
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