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when someone has a fat back and part overlap each other.
Billy- dude look at that hot girl.
john- I think shes got a rat-back.
billy- damn, nvm then..
by jackson hogue July 25, 2008
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Someone who consistently breaks there back for the sake of being an ultimate rat😛
Jamisha like to twerk a lot, she a rat-back.”
by Alexis Dunbar June 21, 2018
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