Caligahan 

A man who thrives on other peoples scraps, such as an ex girlfriend. can be described as a scraps n00b

Dude 1: wow that guy is such a caligahan
Dude 2: CALIGAHANNN
Dude 3: ftw

Caligahan by tehjugg3rnautbitches August 21, 2009

Callahan Theory 

The Callahan Theory is performed when a person completes all of his/her homework on the absolute last day of the semester. No homework is done through out the course until the last day. Then, he/she hands all of it in to the teacher all at once. To complete the theory, you must still achieve a 3.5 GPA.

Matt - "Hey Pat, have you done your homework tonight?"
Pat - "No, we're only two weeks into the course, I follow the Callahan Theory."
Matt - "What's that?"
Pat - "It's when I do all of my homework on the last day of the semester, and still get an A!"

Callahan Theory by MickWhop July 23, 2012

john o'callaghan 

(the sex god of all sex gods), John O'Callaghan is an Arizona native and is the lead singer of indie-rock band, The Maine.
A.K.A John Ohhh

Laura: I saw The Maine last night and they were amazing.

Grace: Wait did you see John O'Callaghan?

Laura: Yeah I got a picture too

*Laura pulls out phone and shows picture*

*Both girls fall over*

john o'callaghan by lookingformisery February 12, 2014

calahan 

A really cool person. Usually blonde. Loved by everyone. Has big feet. Super funny. Makes all people super jelous because he gets all the ladies. Most of the times super cute.

Geez look at calahan go, steeling another girl.

calahan by The true celebrated April 19, 2017

A Callahan 

When you screw over your soldiers or employees because you can't get over your own bitterness. Applies to all people who revel in ruining the lives of others because of their own whimsical opinions. Common symptoms of "A Callahan" include Napoleon Complex, little dick syndrome, and others.

"Dude, my boss won't let me take vacation for my honeymoon. He's pulling a Callahan on me."
"I literally had COVID but my professor won't let me make up the exam. What a Callahan."

A Callahan by psyfloperator November 18, 2020

Callaghan

Carrying out desperate but successful last minute actions

Bankruptcy loomed, but we Callaghaned the deal.

Callaghan by Evil G April 9, 2009

calllahannn 

my famous mutual 😍‼️

calllahannn is a famous mootie patootie of mine 🤤😫‼️

calllahannn by cr0wles June 28, 2021