Top Definition
a fine female specimen found near elliptical, treadmill, stair-stepper, or other calorie burning equipment. usually finely attired in roll-up shorts, sorostitute mixer shirts, and nike shox.
Dr. Swole pwned that cardio bunny on the elliptical.
by Billy Bong Thorton September 17, 2005
Those cute girls that come dressed in skimpy attires wearing make up and going all out on the cock tease, wile pretending to be offended when unattractive males hit on them.
Their workout consists of only cardio routines. It is as if the weights are constantly out of reach for the cardiobunny.
Old school Lifter to power lifter: - Bro, that cardiobunny was on the treadmill for 3 hours straight, she must want the dick.
by LearnedWolf October 14, 2013
Someone who spends time in a 'cardio' room, doing either elliptical, crosstrainer, or treadmill machines with no intensity, and ultimately make no progress. The worst offenders subsequently down a high-calorie beverage, completely negating their workout.
Jane: "Yeah, I hit the gym. I spend a half hour on a crosstrainer."

John: "Don't be a cardiobunny, put some intensity into your workout!"
by Timmy™ March 10, 2007
Those people(usually women) that you see in the gym every single day whose entire workout revolves around cardio exercise. You'll pretty much never see them in the free weights section or even on the nautilus machines. Their whole workout can be summed up as either a lengthy period of time on some cardio machine(like an elliptical) or they take some group cardio class. They get all sweaty and really think they're killing it in the gym, but as time goes on, you notice that their bodies look no different because they plateaued ages ago.
That girl hits the gym almost everyday and she's thin and flabby at the same time. Must be a cardio bunny.
by Nightowl358 November 14, 2015

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