Korean emoticon expressing desperation /disappointment.
(an image of a man kneeling down with both hands to the ground)

O = head
T = arms to the ground
L = legs

OTL is the term used to express a situation where you are so upset that you feel like getting on your hands on the floor and knees down to start crying. The term introduced first in the u.s. by Peter Si(1980).
O shows head down
T shows stretching arms down on the floor
L shows kneel down

A game, originating in San Diego, California. OTL stands for "Over the Line" Similar to softball where there is a batter, pitcher, and outfield.
The objective of the game is to get more homeruns than the opposing team. The batter tries to hit the ball (thrown upwards by the pitcher from the ground) with a bat and get it to fly over a line on the field. If it is caught midair, the batter is out. If it lands on the ground or is touched by one of the outfielders then hits the ground/goes out, then that counts as one base. If the ball flies past the farthest outfielder's head, it's a homerun.

OTL is an emoticon representing failure

O represents the head
T represents the arms on the ground
L represents the legs on the ground

If you're still lost, please see more about OTL at otlplz.deviantart.com

abbrev. for On That Level
phrase attributed to Villanese, lingo frequently used by Villa kids at Blanchet High school in Seattle.
When you are either significantly drunk, or even zooted. undertone meaning is that of happiness.

Acronym standing for "One True Love."

OTL is an abbreveation for Out To Lunch, used in work environments