“YOLO” is an abbreviation for the phrase “you only live once”, which is often used as a hash-tag on Twitter to bring attention to exciting events or excuse irresponsible behaviours, basically an idiots excuse to do something stupid that countless teenagers live by because it gives them the right to be promiscuous, commit crimes, drink underage, do drugs and deny responsibility for their actions.
One of the most annoying abbreviations, popularized in 2011 after being featured in the hip hop single “The Motto” by Drake, yet there are songs released beforehand, by artists who don't reply on autotune and who don't have producers willing to spend millions to over hype the artists material. (See video, RCA Records.)
The overused phrase can be replied with the alternative version of "Y.O.L.O", You Obviously Lack Originality. Similar to Hakuna Matata, a Swahili phrase that can be translated literally as "There are no worries" made famous Disney's 1994 film The Lion King.
"carpe diem" for stupid people.
"Before Drake stared saying YOLO did you guys think you could live twice or some shit?" -Shai Buttah
yolob - yolo, bitch.
yolntiyac - you only live nine times if you're a cat.
yolobaby- offspring resulting from one yoloing.