Means "On My Soul" as in putting something on your life. kinda like a Sacrifice
"People better stop playin wit me OMS."

"OMS she a fuckin Lame."

"Thats crazy Oms!"

"OMS that was funny af."
by RealAsTheyCome January 5, 2012
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OMS: Old Man Strength

The supernatural ability of old men to complete impossible tasks and make young "whippersnappers" and "damn teenagers" look like pathetic wusses.

OMS grows in direct proportion to how
much he just-doesn't-care-anymore. The less an Old Man has to lose,
the further he can throw you. Subsequently, the older the better.
Remember when Robin Ventura (age 25) charged the mound on Nolan Ryan (age 46)? The next thing you know, Ryan has Ventura in a headlock, beating his face in. Yeah. OMS. Need I say more?

Other Notables include: anyone who served in World War 2, Jack Palance, Clint Eastwood, Grandpa Gustafson
by bettis May 12, 2009
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Other Men's Sperm - children a woman has from a previous relationship that aren't yours.
I don't mind having sex with her once in a while, but that's as far as it'll ever go. She's got three kids and I can't be bothered with OMS.
by silentnomoreusa.com November 22, 2010
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Oh, My Satan!
OMS! She looks awful

OMS! I have great news
by 2Real15 March 4, 2016
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