An earthquake that occurs on one's birthday.
Danny: Holy cow, did you feel that? It's like the earth knows it's my birthday!
Alex: BIRTHQUAKE!!!!!
Alex: BIRTHQUAKE!!!!!
by juggleboy January 09, 2010

When a female in labor makes the final push to get the baby out, but lays a fart so long and loud it measures on the Richter scale.
Jesus, while Melissa was in labor with our son Jake and she made the final push to get him out, she dropped the loudest fart that had to measure on the Richter scale. It may have been the first ever Birthquake!
by Tee Cee Deez February 29, 2020

by BananaBurguer August 20, 2014

by gjkuol09 December 11, 2008

by Jenn Regg January 16, 2019

My wife is still in recovery from having a birthquake. My son almost broke her in half when he came out resembling a lollipop.
by ZSMC October 04, 2017

by Ben Cobbs December 17, 2013
