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"oss, I think his mom died last year."

"I don't think she's into you, oss."
oss by hannah_is_the_shit March 13, 2015
1. Posterior, buttocks, ass

(An intentional or unintentional mispronunciation of "ass." Derived from a slackish or lazy way of saying "ass," in which the "a" sound is more difficult than the easier-to-articulate long "o" sound.
Often misunderstood as a German pronunciation of "ass," due to the long "o" rather than "a" sound.
Often confused with the acronym OSS, Official of Strategic Services.
Believed to have been orginated in northeastern Nebraska by a number of smalltown youths indulgin in alcohol.)
You best watch you'self or I'm gonna kick your oss.
oss by P'tainz June 30, 2011
OSS it's a pretty generic term derived from Japanese martial arts. It is a particularly enthusiastic way of saying “yes” or to acknowledge something or someone, similar to the U.S. Marines when we say “OOH-RAH”.

The famous “OSS” has many origins. The first definition of “OSS” as an abbreviation for Onegai Shimasu, which translates into a request, a solicitation, an invitation like “please”, “if you may” or “with your permission”, much used when inviting a partner to train.
Sensei: Are you ready?

Kouhais: OSS!
OSS by WhiteBeltGabi January 15, 2022
So then he was telling me that I'M a slut oss!
OSS by effyoubiatchesssss December 5, 2010
The GIMP is a fine example of OSS.
OSS by KFM November 26, 2004