meshuggener 

1. Crazy; insane; mad.
2. Crazy person; a lunatic.

From Hebrew via Yiddish meshugener, from meshuge (crazy) + -er (masculine singular person suffix)

Often pronounced without final -r, influenced by both Yiddish gender inflection and non-rhotic American dialectal pronunciation.

I was sitting there eating my breakfast when this meshuggener burst in the front door of the restaurant and tried to take us all hostage.

meshuggener by bluegrassfan February 1, 2005

Meshugener 

Meshugener (pronounced as meh∙shoog'∙en∙er ) is the Yiddish word for crazy person.

HA-HA, look at that meshugener running around pantless!

Meshugener by Cousin Chaim May 24, 2012

meshuggenehs 

one who is insane; crazy: phycho

damn meshuggenehs always messin up my car

meshuggenehs by Visionary March 13, 2005

meshuggenah 

Yiddish word meaning:

1) noun: crazy person

2) adj: crazy, insane, deranged, batshit

Related to: meshugas

1) Only a meshuggenah would actually watch InfoWars.

2) The president is a grade-A, meshuggenah asshole who quenches his thirst with only the finest Russian hooker urine that money can buy.

meshuggenah by Dr. Dreidel, M.D June 8, 2020