Not to be confused with the phrase "gregging it" which is masterbation into a hat.
"Today I looked up pornography on the internet and started greging it because I was bored"
2)"Hey did you here what Sara Palin did the other day?"
"Yeah, i'm going to protest by greging it."
A person who would start gregging it would be someone who goes out on weekends and attempts to get laid, or someone who is very democratic.