Smo = Humpie.
A strange biped humanoid who is prone to revert to his alternate personality when it is least expected.
"Is it Humpie? Is it Smo? Is it an incredibly obscure transsexual? We can't tell, and neither could you."
by Some Rando February 17, 2004
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adj:: so straight that the word straight is too unstraight to describe it.

Antonym:: unsmo
Girl 1: Oh my god you're so hott.

Girl 2: Um. I'm smo, thanks.

Girl 1: Oh. I'm sorry. I was unaware.
by Made line October 15, 2008
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Social Media Optimization:

The art and science of maximizing content on task-appropriate Social Media outlets. Generally in support of a Reputation Management campaign.
Automotive Dealer: Can SMO drive buyers to my website and inventory?

WebDeals: Yes, SMO is an excellent method of controlling search results regarding your company, car line(s), location and even your competition!
by WebDeals July 11, 2008
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Nobody actually knows what the hell this means, but we think it's the act of being mean. Contrary to popular belief, smo is NOT the act of being mean, nor it is "suck my ovaries" or whatever definitions there are.
Smo is just..smo.
Can be used as an adjective, noun, and a verb. All at the same time. That's right.

Osaka- Smo on!
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A pool guy who low bids.
Big smo is the 75 dollars full service pool guy
by Pond boy December 2, 2021
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Created when i was pissed and arsed moving.
Look fuck off u wanking smo.
Im so smo?
Meeeeh smo me plz
by rob August 4, 2004
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