An Ack is a person with no common sense. An ack is usually a child with slight autism who acts as if they are more solid than the dicks that penetrate them. They also get extremely triggered on any game from Minecraft to Destiny, causing them to have breakdown and cry to their mother. Finally, they seem to have no control over their bowels and often shit themselves, causing every piece of clothing, not just underwear, to be covered in shit stains. In serious cases, an Ack will be unable to agree with anyone else causing everyone, even their own family, to know then as a little bitch.
Ack: OMG HOW DID YOU DO THAT YOU FAT WANKER

Bystander: what an Ack
by Legit Tings December 13, 2016
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Short for "acknowledged". Used in written speech to quickly let the other person know you received their message.

Inspired by the ACK packet of TCP protocol.
A: I just published the article.
B: ACK!
by goodhoko June 14, 2022
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The one word in the language exposed to the world in Mars Attacks. Can also be used as the sweet sound of music - working particularly well with the Knight Rider theme tune.
Ack-Ack-Ack-Ack, Ack Ack Ack Ack, Ack-Ack Ack Ack Ack Aaaaaaaaack.
by When Dingoes Attack October 3, 2003
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something that you wouldn't normally do and when you "ack" , your eyes get watery
Hey! I am so ack! I just did something that I would not normally do! And my eyes are watery!
by L.M.A.O News December 22, 2008
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Verb: Brookline bros gaming with great strategy late at night
Guy1 : We acking tonight

Guy2: Yea 2am be there lets ack it up
by BigMan31 December 27, 2010
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when you disgusted by anything/anyone and want to spit on them because the are a disgrace to human kind
woah a fucking furry ACK!!!!!!!!!!!!!!!!!!!!!!!!!!!, woah someones tryna largamanoodle me ACK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!, someone doesn't have robux ACK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.
by Riley, Zac July 10, 2019
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