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An abbreviation of the word suppose, something you should do or you are suppose to do.
you are posta stop at da red light
by Christine Smith July 19, 2005
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A small round glowing orb that is ejaculated out of a man's belly button when over bloated and sexually aroused simultaneously.

It can be controlled telepathically and is scolding to the touch.

It is often mistaken for a small food sex fairy, but is actually immensely dangerous.
I went over to Denises' house and ate over half the pizza, she began to take her clothes off, and my postum came out.

I haven't seen Jenelle in a few days, Jon must've shot his postum at her again.
by Hydrox Cheezels April 27, 2009
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A word in place of ā€œsupposed toā€ when you donā€™t feel like saying the whole thing
Iā€™m posta pay deshaun back later today.
by BJK42 December 15, 2017
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