Top definition
To dress in ones finery and have sexual intercourse whilst walking.
I met this girl at a bar last night, we skipped the cab and engaged in some promulgatus on the way to her place.
by P10 H. February 08, 2011
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Jul 29 Word of the Day
Someone who used to be a potential girlfriend/boyfriend, but no longer is.
Tim: Zack, is that your exgirlfriend?
Zack: No, she's an expotential. We never actually dated...
by brownsuite September 24, 2011
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