Two gay men driving around trying to pretend they are straight by attempting to yell at girls through the window. But rather than actually yelling something useful to pick them up, they yell something ridiculous like "DOHHHH!" and then boyishly giggle about it in the car. Then they go home and have gay sex and grand pappy smash each other.
Dialogue of a Filly Run:
Bobby: Hey Dan... look there's a girl.
Danny: Cool man.
Bobby: Wanna try to talk to her?
Danny: Nahh
Bobby & Danny: (out the window to the female) DOOOOHHHHH!
Danny: Let's go have gay sex.
Bobby: Yeah, definitely. And grand pappy smash each other too!
Bobby & Danny: OH YEAH!
Bobby: Hey Dan... look there's a girl.
Danny: Cool man.
Bobby: Wanna try to talk to her?
Danny: Nahh
Bobby & Danny: (out the window to the female) DOOOOHHHHH!
Danny: Let's go have gay sex.
Bobby: Yeah, definitely. And grand pappy smash each other too!
Bobby & Danny: OH YEAH!
by Parkway July 9, 2006

Your giving it to her doggy, then you spit on her back and when she turns too say "your done already?" you explode in her face.
by JJW-6 January 6, 2007

by HothamBoys September 25, 2018

by brown7905 May 19, 2006

Straight from El Paso, Queef in Texas is known as a Filly Fart.
A filly is a Mare or female horse for you city folk.
A filly is a Mare or female horse for you city folk.
by El_Borbah December 31, 2020

by Im holo April 9, 2017

I have fillie depression.
by sad depression February 12, 2018
