1. Undoubtedly the most intriguing character in Xenosaga Episode 1: Der Wille zur Macht.

2. Pure sex.

3. Ownage juice.
KOS-MOS: "I own you all."

All: "...yeah"
by Kenji Tetsuo March 25, 2003
A character in the video game Xenosaga that has the ability to turn little girls gay.
When MOMO met KOS-MOS she immediatly turned gay.
by Dead_Board December 7, 2006
An Anti-Gnosis Humanoid Fighting System, serial number
00-00-00-00-1. Development name KP-X. Abbreviated name KOS-MOS. Configured for simulated battle, while kept at a fighting capability of 22% of it's normal out put
by johnathan gibbs January 6, 2004
An awesome Xennosaga character and the coolest android ever.
Another definition of kickass.
Damn kos-mos just pwned those aliens!
by Patriotic@america December 23, 2005
The sexy, super awesome crossdressing younger brother of Hae-Gi in the shoujo manga (girls japanese comic)Snow Drop. He has...really nice legs. ^^
Ha-Da thought Ko-Mo was a sexy chick and tried to get his number...he thought wrong!
by JellyMeh January 28, 2005