look up any word, like fellated:
 
1.
Short for Titty Hard On. When a female's nipple is erect an visible through layers of clothing due to cold, windy conditions

THO Factor: buffalo slang for wind chil
Man, teh THO factor is below zeoo out, I'm freezin
Must be cold out, that girl over there has a major THO
by Tech Geek September 07, 2004