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The act of a female sucking a guy’s ball sack while her nose tickles his arsehole. Particularly effective when the female has a large, pointy nose.
“Man that girl’s hot, but she’s got a weird nose, I’d love her to give me a G-man.”

"Look at the nose on that bird, bet she gives a good G-man"
by Agallagher1987 September 29, 2009
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22
strange Yale men who girls should avoid
Laura should avoid the gman on campus
by briesdelusions September 24, 2006
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23
The Valley, Australia.
A hero of the Valley music scene, but then he turned emo on everyone in 2004.
Because of this, everyone now hates him. And makes fun of him.
by super16 May 11, 2004
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25
To perform the act of rubbing another man's prostate.
by Tapie12345 November 29, 2010
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27
A 'G-Man' is usually quite a cocky guy, with far apart eyes. The kind who wears vests and bling. Usually with far apart eyes and anger to make up for a tiny penis. Prone to teabagging people while they sleep.
'so is that your friend Grun?'

'ew, he's not my friend, he's such a g-man'
by niqqagal1367 September 11, 2012
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