Girth-Quake 

When a mans flatulence moves forward instead of back or straight out the cheeks and causes his genitals to vibrate

"Man this leather seat just made me have a girth-quake"

Girth-Quake by LolaBunnyyy August 21, 2018

Girth quake 

When the bust is unbelievably strong, creating a anomaly that's too much to process.

Person 1:"Bro sam did a girth quake right infront of me yesterday"
Person 2: " fuck im sorry to hear that"

Girth quake by Slidewayzz December 9, 2020

girthquake

1. the ground-shaking effects one may experience when an obese person is walking near.

2. the shaking, trembling effect one may experience during or after sex with a person who has a large penis.

Every time he walks by, I feel a girthqake.

The size of his unit caused a girthquake. The aftershocks caused my legs to shake for hours.

girthquake by Brandoonline May 5, 2011

Girthquake

(1) The effect a very attractive woman (or group of women) has on the 'girth' of male members in her (or their) vicinity. This Girthquake can be measured on the 'Dichter' scale- from one up to ten, and is a handy way of discussing the attractive potential of women. Can be accompanied by rattling of glass on table to indicate violence of initial tremor, or at higher ends of the 'Dichter' scale by 'Star Trek' style synchronized pitching from side-to-side whilst trying not to spill drink, as if floor is swaying.
(2) (noun) A way of describing a previous evening, or party- if said event led to the conquest of an improbably attractive woman, or if the ratio of such women to men was unusually high- said event/evening can be described as being a 'Girthquake'. In the event of such an evening leading to a secondary event (such as an afterparty) where a further woman (or cluster of extremely attractive women) who rate highly on the Dichter scale is discovered, then the term 'Aftercock' can be substituted.

MAN1: "G...g....g.......GIRTHQUAKE!" (has spotted woman who scores on Dichter scale- remember optional rattling of glass on table to indicate violence of initial tremor)
MAN2: (adopting scientific expression) "In my opinion at least a 7 on the Dichter scale. Be careful, there is a strong chance of an 'Aftercock'"
(stands, switches to Roger Moore expression and approaches woman)

Girthquake by N.J McBlanky July 9, 2009

Girthquake

Probably the thickest cock you will ever see. And this thing is thick a little thicker than a baseball bat.

Zack: wow latisha got destroyed by that guys girthquake the other night
Nick: wow he must be really thick

Girthquake by Thick nick October 8, 2014

gurthquake 

When someone pulls out their cock and it creates an earthquake when it hits the ground.

Don't pull your pants down, we don't need another gurthquake.

gurthquake by GurthMaster5000 October 25, 2015

girthquake

Any seismic event caused by ones weight, especially an obese person or obese people

The girthquake from when that fat bitch went by totally spilled my drink

girthquake by Zach "smack my bitches" Bridges May 20, 2007