tir is and acronym used in a common song. "T is for tits and taco bell. I is for indians drunk as hell. R is for raunchy nigger smell and that spells the word tir."
T.I.R
by lollypopping March 12, 2010
TIR is an internet acronym for Today I Remembered or Today I Realized, for when you remember something from the past or have a sudden awareness of something. TIR is similar to TIL (Today I Learned) but often indicates past knowledge or exposure to the information.
TIR an awesome cartoon from my childhood.

TIR how to write the letter "G" in cursive... and that we never used cursive in high school.
by zants December 20, 2011

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