Earthquack 

Definition to be still unknown believed to be a legendary pokemon that can shake the earth with only its cries.

Psyduck at powerlevel 999999 of supersaiyan crying Earthquack

Earthquack by DuckTrainer July 24, 2013

Earthquack 

A period of time,in which the earth goes QUACKKKKKKKKKKKKKKKK

Earth:-rumble-
Person 1:What was that!?!?!
Person 2:it's a earthquack-
Earth:QUACKKKKKKKKK

Earthquack by Fanasyz June 16, 2010

Earthquack 

Its a common mistake in typing "earthquake"

Me: Oh my god, There was a huge earthquack last night
Friend: A what..
Me: FUCK I MEANT AN EARTHQUAKE

Earthquack by Quackles Quackling February 6, 2015

Earthquack 

The Anti Ginger Crew
When a duck's quack has such a loud echo that is causes an Earthquake
( which it does it just sounds the sme as the orignal and cant normally be heard)

Duck - "QUACK"
Farmer - "EARTHQUACK!!!!"

Earthquack by WeeStev0 January 15, 2009

Earthquake head 

Absolutely mind blowing fellatio.

Last night's blow job was a real Earthquake head.
I thought my brain was going to explode!

Earthquake head by fishyfishy-oh May 29, 2012

batman earthquake

When a man jumps off of a high surface, e.g. a counter or dresser, and slams his fully erect penis into his partner's ass

Guy 1: Hey man, did you give that chick a Batman Earthquake last night?
Guy 2: Yeah, she liked it because her parents were also dead

batman earthquake by Dragor July 9, 2016

You make my earthquake 

When you get that feeling of butterflies and the world stops just think about the that special someone

Damn babe you make my earthquake

You make my earthquake by Bigdaddylk February 8, 2020