An opponent or enemy that is to be attacked, maimed, and or killed at first glance. Commonly abbreviated as OSO or O.S.O
Xio said our poster looked ugly. That bitch is officially an On sight opp

IS THAT XIO OVER THERE ?! That bitch an OSO! GET HER ASS
by avia_ei_simp April 17, 2023
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While sole beings' lives sinful in fear & frightful unscrupulous morally now sorry insightful yet sightful life characterised by clear flowing transparent streams scream for similar measure of internal reform sun beams.
by Hercolena Oliver June 15, 2010
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telling a bitch to fuck off or they gonna get the shit beat out of them
Girl: bitch you hella fake stop talking shit
Other Girl: hun if you dont shut the fuck up then catch me on sight
Guy: ooo damn that girl gonna get the shit beaten outta her ugly ass
by isabella matri October 25, 2017
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a psychological fallacy that people who look alike and sound alike act alike which forms misconceptions
Sights and sounds made most persons live off of social security in their retirement.
by Coop Dupe January 26, 2020
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