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2.
An erection; see: boner, woody, hard-on, stiffy, pitching a tent
"Man, I've got such a raging steggy right now I think it might rip through my jeans"
by Jurassic JoJo October 15, 2012
 
1.
To be the raw-est mutha fucka around.

To be so legit people drool when they see you.
"That kids so steggy, he's got bitches for days"
by The master debater November 21, 2013