PSO

Potential Significant Other, referring to an individual not quite your significant other. Could pertain to a date, a crush, an unrequited lover, a stranger you'd like to marry, etc.
My PSO totally asked to borrow my pen in calc today.
by swtcaroline December 14, 2006
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PSO

Platonic Significant Other

A best friend, life partner, whoever you spend time with. Same as S.O. but without sex or romance
NOT friendzoning, neither person wants to date and they're just best friends
My best friend is my PSO, we do everything together and people often ask if we're dating, we're for sure not though
by I don't want my tits anymore September 19, 2022
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PSO

Sorry guys are not my PSO.
by Gracacillian April 01, 2019
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PSO Vixens

Bunch of dried up old has-beens who sit on the end of a phone pretending to be young and slim while guys on the other end of the phone jerk off.
The missus is out tonight, I'm gonna rub one off with the PSO Vixens.
by FatBoyBob August 02, 2008
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