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When you strike someone in the stomach with a quick chopping motion to make them shit their pants
“Olivia happooned caitlyn and she sharted
“Lila had to run to the bathroom after being happooned”
Happoon by ballsacc1219 October 25, 2019
Related Words
The pinnacle of happiness. Being happy to the point that almost defies definition:The feeling that fills you once
you are reunited with your significant other after an agonizingly protracted separation from one another.
After her plane landed and our eyes locked onto one another,I was no longer feeling disconnected. I was happoppy!!!
happoppy by KeithB June 26, 2008
The shit you take after a long night getting drunk on Harpoon IPA.
Wow, that Harpoop smelt so bad I almost threw up.
Harpoop by Gerald Wallington July 10, 2009

HaPooPoo 

when someone is hapoopoo their rlly cute and rlly cool because everyone should be hapoopoo in this world. unlike xray tho c:
Makepp is Hapoopoo :))
HaPooPoo by LilDoodlingAva <3 November 9, 2020

Hapoopen 

A level up from a cup-a-cheese, a Hapoopen is when you fart in your hand and throw it at someone's face. The more you sound like Ryu from Street Fighter, the better
Guy 1: *fart* *chuck* HAPOOPEN!!!
Guy 2: *sniff, sniff* aw dude what the fuck!?
Hapoopen by CaptainOppai June 12, 2022