1) to seriously fuck up a situation
2) to suck a given dick
3) to expel air out of the mouth toward an object
1) Liz really blew it when she started using her teeth while blowing it.
2) "Well, I'm on my knees. What should I do now?"
"Blow it!!!"
3) "I actually meant SUCK it, ya dumb bitch (SMACK!)"
A lessabrasive, somewhat childlike way of telling someone to fuck off.
While driving my five-year-old to school, I resisted the temptation to flip the bird; instead I calmly leaned out the window and inquired, “why don’t you blow it out your hi-ho?”