Top Definition
When you're walking along and you suddenly let go of every muscle in your body, making it look like you died instantly. Works best next to a pool or on the beach.
Watch me walk along the edge of this pool, I'm gonna instadeath into it.
#dying #death #hilarious #funny #insta-death
by GGK78 May 16, 2013
An excessive concentration of something.
Damn this coffee is strong enough to cause instadeath.
#death #coffee #concentration #excessive #instant.
by Sara Snider October 11, 2007
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