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A woman who arches her back rather than sticking her bum in the air whilst being shagged from behind.
I'd rather make my own sandwiches than go for a ride on an archback.
by Jimmephray June 06, 2015
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A flat girl who arch's her back to make herself look thiccc
"Look at that mirror pic Emilee took, she's such an arch back"
by Hailayeeeee September 14, 2019
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