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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 09, 2007
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2
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 14, 2003
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3
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 02, 2015
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5
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 May 31, 2018
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