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A person who is both posh and white trash at the same time.
My brother's girlfriend's daughter Tilly just got kicked out of her Β£10,000 a term boarding school for smoking, drinking and stealing money for her drug dealer boyfriend. She's proper trosh.
by Lord Arthur Hume de Chardin II November 06, 2013
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The back of your upper thigh, or area right below you buttocks.
"Hey I saw that crazy guy trying to spank you in the butt with that stick, did he get you?"
"No, he missed and went a little low and got my trosh."
"Ouch, he spanked your trosh?"
"Yeah, it hurts like hell."
by themagicturtle October 10, 2009
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