The term for the guy a girl uses to have meaningless sex with after a breakup even though she doesn't like him. The "backup" guy for sex.
Guy: "Hey, how did things go with Tiffany?"
Friend: "Not good. Turns out she just used me as a rebound dick. She didn't really like me."
Guy: "Ah fuck. That's cold."
by PandemicMEM May 20, 2016
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When a girl goes after the male friend of a guy who just rejected her
Jim and Jane broke up
Jim's best friend Kyle is now Jane's Rebound Side-Friend Dick (RSFD)

Jane wants Kyle's dick
Kyle and Jane hook up
by KingSwagger January 24, 2012
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