A needle loaded with a dose of epinephrine carried around by people with life threatening allergies. The autoinjector quickly injects a prefilled dose of epinephrine into the system thereby opening a window in which a person can get medical help before dying.
Do you have your epinephrine autoinjector with you in case they put nuts in any of the dishes being served at Blair's wedding?
by allthat17 November 28, 2013
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A more emphasized way of saying, “what the heck/fuck?!”

Used especially in a particularly stressful situation.
*car screeches to a halt, nearly hitting you*

You: what the epinephrine?!?!
by faded&jaded January 31, 2018
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