Orz

orz is a posture emoticon representing someone on their hands and knees in frustration or defeat.

"o" is the head "r" is arms to the ground "z" is the legs

Origin
It was first used in late 2002 at the forum on Techside, Japanese personal website. At the "Techside FAQ Forum" (TECHSIDE教えて君BBS(教えてBBS) ), a poster asked about a cable cover, typing "＿|￣|○" to show a cable and its cover. Others commented that it looked like a kneeling person, and the symbol became popular. These comments were soon deleted as they were considered off-topic. However, one of the first corresponding reactions can be found on the thread on "Techside Chitchat Forum" (Techside一言板. ) at the Wayback Machine, on December 23, 2002.

Variations

 * OTL
 * OTZ
 * on_
 * STO
 * JTO
 * O|¯|_
 * or2
 * onz
 * onz