when you are fucking a chick doggystyle, you pick your nose and wipe it underneath her nose, hence giving her a green mustache aka the DIRTY LEPRECHAUN!!!
dude... I was nutting my wife from behind last night and I had this greener I fished outta my nose and gave her a Dirty Leprechaun!
by GOBLINGRINCH September 01, 2008
When you are squatting over a girls face naked while she is sleeping, like a little leprechaun with your asshole spread open. Next, you throw a pint of Guiness in her face to wake her up, then she wakes up immediately slamming her face into your asshole.
by AVC8 December 02, 2011