Top definition
acronym standing for "in real time"

when added to a sentence or exchange of information, "irt"gives the context that the data just exchanged is the most recent, i.e., relevant.

real time: live, current, present, as-it-happens, as-of-now
YOU: aren't you getting my texts?
ME: no sorry- my phone number is 555-2334 irt. text me there.
YOU: why?
ME: bc i never paid my bill so i'm using a text-to-talk app.

it's 7:52 a.m. irt but by the time you read this it could be evening.
by buttboss August 13, 2016
Happy St. Patties Day!
Interborough Rapid Transit Company, aka the subway train.
In NYC, if you catch the IRT Lexington Avenue Line, you'll end up in a ratchet neighborhood.
by N3vvRmiNd March 23, 2014
Happy St. Patties Day!
buy the domain for your art blog
In Reply To or In Response To
Blaze: Can anybody help me??
Luke: IRT Blaze Yes I can.
by Diamond January 10, 2004
Happy St. Patties Day!
Sally: Woah, you beat me at Halo... again...
Sally: You're a bad sport.
Bob: Suck it.
by lauuuuryyynnn July 21, 2008
Happy St. Patties Day!
The sound one makes at the frustration of having performed a typo.
Bob (typing) : Hey man, what are you doinfgh tonight?

Bob (speaking) : IRT
by Ironmanning July 03, 2010
Happy St. Patties Day!