ack 

The sound that forty-one percenters make when they commit sudoku

Trans rights are human ...ack!!!

ack by HairyManBalls December 8, 2021

Ack 

A sound that you make to notify a person you are joking. Extra letters can be added to it to show emphasis. Drizzy Drake makes this noise in the song over

ACK!

Ack by Izilluh December 20, 2010

Ack 

a bad ack, the opposite of a good crack. Can be used to describe something that is particularly substandard or to denote boredom and/or disinterest

"Do you like that new Starsailor Track?" - "Nah it's Ack"

or

"Alright mate how's it going?" - "Not too good pal, the manager at work says that tar..." - "ACK!"

Ack by Huge Ackman September 16, 2003

ACK 

ACK is used to define Adedayo Charles Kunle, now used as a political term

I acked the election

ACK by ACKCITY November 27, 2018

Ack 

Ack means anonymous cunts kill..
Bahaha.

"ack-"

Ack by ack girl February 19, 2020

Ack 

An expression of a negative emotion which is built up and making one feel ‘poopy’. Used commonly in messaging and social media

‘i’m a whore’
ack

Ack by 1237_ February 20, 2020

Ack 

(v): an insult, usually interchangeable for the word fuck. Can also be synonymous for telling someone/something that they suck

Evan: "Hey guys can you please let me into the studio?"

Everyone: "No, Evan. Ack you."

Ack by _thememeprophet_ April 1, 2020