Stands for "Hang Out in Real Life." Rose to popularity due to the need to
differentiate between Google+ Hangouts (the group
video chat option) and physical, "real-life"
hanging out. Introduced by Google+ "Product Dude" Bradley Horowitz sharing it on his Google+ stream.
Pronounced "H-I-R-L," not "hurl."
Person 1: Alright, gonna go hangout with Brad.
Person 2: Wait, a G+ hangout over webcam?
Person 1: No, we're gonna HIRL at the bar.