ACK

an exclamation of shock, surprise, or disappointment to be used mainly by awkward individuals

"ACK! I left my wallet at home!"

by mylifeisawk May 2, 2012

ack

Short for acknowledged. When a person says something that doesn't require a response, but the person wants to let them know they recieved the message. Similar to okay, but when using okay just won't do.

Sanford: I had cheerios for breakfast today.
Stephen: I don't care
Sanford: Ack

by JesusPirate August 19, 2010

Ack Ack

inconspicuous nickname for marijuana, esp. when used with parents/police present. Can also be used as a verb (See example below)

N.)- Yo lets go get some of that dank ack ack from that kid down the street.
V.)- Im gonna go take a cruise and ack it up if you wanna come.

by ThaStonedGecko January 28, 2007

Ack

Ack means any swear word that you can think of.

"You can go ack yourself!"

by Phoenix_Slayer 565 February 8, 2018

Ack

Nerdspeak for "yes" or "I hear you"
Usu. used on IM by programmers

"Is the latest patch on the source server?"
"Ack"

by mistervague November 8, 2003

Ack

In the TCP protocol, the receiving computer sends an ACK (acknowledgment) to the sending computer. This is basically how a coonection is established.

Sender sends 3 packets, Receiver receives 3 packets and sends "ACK 4" (meaning it received what was sent, and it's ok to send the next number or packet)

by Obi-Wan December 9, 2003

Ack

The natural sound someone makes when choking

Person 1: ACK ACK ACK
Person 2: Are you ok?

by Still chill still chill February 21, 2020