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3.
A song used during the playing of Rock Band in order to put another member of the band on blast.
Crushcrushcrush begins....

Jerk Ass Singer of the Group: "This song goes out to our drummer(name redacted) from our guitarist (name redacted)."
by rock band! April 02, 2008
 
1.
created by the song "crushcrushcrush" by Paramore. An intense heartbreak feeling after a love.
"crushcrushcrush. Nothing compares to a quiet evening alone. Just the one-two I was just counting on. That never happens, I guess I'm dreaming again. Let's be more than this."
by hornmeister November 04, 2007
 
2.
A popular song performed by the band Paramore, added to Guitar Hero: On Tour: Decades, for the Nintendo DS.

Also, what you feel when you and your best friend like the same guy, and the guy likes you both, and you're pissed.
Example A: Girl: "Hey! Did you hear CrushCrushCrush by Paramore?"
Guy: "Yeah, I played it on Guitar Hero!"

Example B: Juanita: "I love Bobby!"
Jamie: "Me too!"
Bobby: "I love you both!"
Both Juanita and Jamie: "What?!"
Bobby: "Oops..."
Jamie: "I feel CrushCrushCrushed."
Juanita: "Ditto."
by CrushesYourFace April 10, 2009