Top Definition
Being ridiculous, rude, outrageous or downright terrible. You can be called out for being tertz by a group of your peers or by yourself. Sometimes being tertz is a good thing. Other times it's just downright tertz. At the end of the night, someone is crowned most tertz.
Stop pissing in the street, you're being tertz.
Stop throwing shade at Betty, you're being way too tertz.
by Tertzmaster October 11, 2013

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