When your happy then someone says one word or did one thing and it instantly makes you so mad that you can't form that right words, your face feels like it's on fire and your head could spin around at any second.
Examples of instamad
1. You patiently wait for the empty parking space , the car finally pulls out out give a friendly wave and some jackass comes flyin' in and takes the parking spot. Instamad!! Uncontrollable curse, beat the stealing wheel and yell. While your family looks at you like your crazy.

2. Gary was instamad when the fast food place wouldn't accept his travelers checks. He spoke in an unknown pissed language and ended with telling the order girl to get the glitter off your face -it looks stupid!
by messy bun October 29, 2017
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