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A title given to any sports team that displays a tendency to pick up nail-biting victories.
After edging San Diego on a last-minute 2-point conversion, the Denver Broncos look to be this year's Cardiac Kids.
by brentman87 September 20, 2008
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Someone who always comes up clutch when needed, you can't keep them down because they always fight their way back, contender, showstopper
Donaldson hit a 3 run homer in the bottom of the 9th yesterday, you can't stop him he's the Cardiac Kid
by RightFielder September 30, 2015
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