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To not literally bum someone, but cater to their every need. For example, you always talk about that person, you always say how attractive you find them, you make them cakes and stuff. and (not literally) you bum lick them.
Emily: "OMGG i love ben he is so cute, isn't he so cute! i love him! I'm gonna make him a cake on his birthday"
Beth: (rolls eyes) "cool can i help?"
Emily: "NO WAY, i don't want you getting any of the credit cos i love him"
Beth: "OH **** you! just cos your professionally bumming him"

EMily runs off and crys.
by Betty Weiner September 27, 2007
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