by stacy22 August 30, 2009

An external force or forces (eg. person, event, place, thing, etc.) that contribute(s) to making a decision either one way or the other.
Tom: I'm not sure if I'm going to Derek's party tonight.
Dave: Tracey will be there. I heard through the grape vine that she gets down with one dude and another girl on the first Saturday of every month. Guess what tonight is!
Tom: Well there's my swing factor.
Dave: Tracey will be there. I heard through the grape vine that she gets down with one dude and another girl on the first Saturday of every month. Guess what tonight is!
Tom: Well there's my swing factor.
by SnooksOnFire February 12, 2010

Within a 24 hr period, you wake up in the morning with a female that is 30 years younger than the chick you're hooking up with that night.
It was just yesterday he got a 30 year swing.
First the Gilf, then the granddaughter, talk about a 30 year swing.
First the Gilf, then the granddaughter, talk about a 30 year swing.
by Przk December 20, 2018

by I’m actually right October 11, 2020

by peter fitzintite May 8, 2011

by Lostcloud January 14, 2017

When you fuck someone so hard that it crushes the bone and you need a swing of mesh to hold the guts and sew it all back together.
by jonny_raige February 5, 2014
