When a guy gets a girl out of his league to have sex with him.
"I didn't think Renee would get with him, but I guess he is a total box opener!!"
by MelRose January 26, 2015
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when someone leaves you on opened on snapchat, according to georgia bunkers
“Hey did Laina respond to your snap?“
“No she open boxed me”
by Kitty Girl meoowww September 14, 2020
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Fred: That open-box has been with everyone in town!

or

Matt: He didn't have enough packaging to fill the open-box.
by M. Gaffney September 2, 2007
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