Part of 1337 speak. Used by jackasses who want to show that they didn't forget to push the shift key but are using 1 instead of ! just to piss people off.
by Nobody Important September 29, 2004
 Get the onemug.
Get the onemug. by Fresh Livin' May 6, 2015
 Get the on onemug.
Get the on onemug. I've just found the office microwave completely fucked-up. Who did it? No-one did; since this is shit no-one cares about.
by manigordo May 1, 2008
 Get the no-onemug.
Get the no-onemug. The first episode of the first season of a show (season one, episode one). The first level in a game with multiple worlds (world one, level one).
by PhillyHippy September 24, 2019
 Get the one-onemug.
Get the one-onemug. A form of fighting. To throw down the ones is to fight weaponless, one on one.  ones must be called by one party or the other, and there has to be a good reason, shit talk etc. A person cannot call ones because someone else called ones on somone else.
by blackened April 17, 2004
 Get the Onesmug.
Get the Onesmug. 1. I haven't onned my computer yet.
2. He onned me but forgot his condom, so I had to let him get me pregnant.
2. He onned me but forgot his condom, so I had to let him get me pregnant.
by PuvoGuru July 23, 2009
 Get the Onnedmug.
Get the Onnedmug. 