look up any word, like ratchet:
 
1.
Top Mount Intercooler
The factory Subaru WRX STI uses a TMIC
by NICK DIBLASI / STEALTH-WRX January 02, 2005
 
2.
Too Much Ice Cream-This can have a variety of meanings, such as eating enough to cause a brainfreeze, or eating so much that one becomes fat.
"Oh, man, TMIC..." "What? There's no such thing as too much!"
by Furrin October 21, 2014