Noun. the boner you get for a girl who looks sort of like your ex-lover/crush/etc.

Etymology: "Rebound + Boner"
You: You know that girl kinda looks hot.
Friend: No man. She's just okay.
You: Yeah, she just resembles my ex a little.
Friend: REBONEDER.
You: CAN YOU BE A MORE CONSIDERATE FRIEND?
by sadlittleboy January 15, 2010
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