ACK

Used to display displeasure of having to do something you don't want to do.

Ack! Was the sound Bill the Cat made when hacking up a furball, in the cult comic, Bloom County, which Berkley Brethead drew.

"Mike you have to lead the team meeting today."
ACK!

by WTPooh November 30, 2017

ACK

Something you say like a funny noise in a text, or in real life when you are acting retarded.

*commits die* ACK ACK AKK ACK ACK

by Ihatmylife October 9, 2019

ACK

The call letters for Nantucket Airport.

duh.

SON: Wow what do all those "ACK" bumper stickers mean?

DAD: Well son they are the call letters for Nantucket airport.

SON: Gee whiz dad! I wish I could be from Nantucket....

DAD: Don't we all son, don't we all- *sigh*

by Chain_Me_Free December 7, 2004

ACK

the airport call signal for nantucket...like you know, JFK or LAX

Tourist: "excuse me, what does ACK stand for?"
Exasperated Native: "It's the god damn call signal for the airport!"

by ooer May 23, 2005

Ack

A sexual sound made by penguins when reaching orgasmic crescendo.

First penguin: Ack! Ack! Ack!
Second penguin: Got a light?

by Glub May 13, 2005

Ack

a form of exclamation

"your underwear is showing!" "ack!"

by christina November 11, 2003

-ACK!

A meme originating from 4chan and soyjak.party around late 2021 used to deride another user by indicating that they're suicidal, e.g. that they were hung in the middle of typing their sentence. It immediately ends the quoted sentence, is often put in place of vowels near the end of a sentence for maximum onomatopoeification, and in addition it's almost always in greent-ACK!

Anonymous No.1: rope tranny you will never be a woman
Anonymous No.2: >rope tranny you will never be a wom-ACK!

by Travis God of eyelashes June 1, 2022