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The act of masturbating to a member of Big Time Rush, esp. after seeing a particularly arousing moment and or photo of them.
Rushing off is usually related to slash moments, i.e. Kames, Cargan, Kogan, etc.
"Look at this GIF of James working out."
"Woah, woah. Gotta go Rush-Off real quick."
by bigtimebj June 29, 2013
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