A hook-up, usually for sex, that happens infrequently, usually once a year.
"Does Pierre ever get laid?"
"Yeah, he's got a season ass during Comic Con."
by dwaynetrobinson April 17, 2015
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The fetish of sprinkling powder on your butt cheeks when they’re wet or sweaty. This fetish can be achieved with a partner or not.

Usually something like seasoning, Parmesan, spices, pesto, baby powder, etc.
Guy: Hey baby let’s do it together.
GirlS Oh yeah. I have a total power fetish and would love to do it with you.
Guy: I’ll sprinkle a little Parmesan and spices on that cute, sweaty, and round looking ass.

Girl: I am ready for a total ass seasoning. I like ya.
by Justicewithtacosandweed August 8, 2018
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It's where you slap people asses to show respect and affection
Guys, it's slap that ass season.
by Khris Mich October 15, 2019
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