1) (adj.) Being as high off of marijuana as the famed Rob Ackerman. 2) (v.) The past tense process of smoking. Synonym with smoked, bowl, weed, kush, etc; terms deriving from marijuana and marijuana paraphernalia.
1) "Bro you cannot possibly be acked." 2) "We acked a few bowls ma nigga." 3) "Yo man I'm tryna rock out, did you bring some ack?"

*note one cannot reach the level of Ackerman
by Jujuthegiant November 10, 2013
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The basic blocks of the Martian language from Mars Attacks.
"ACK ACK ACK, ACK! ACK ACK ACK ACK! ACK." - Martian Ambassador
by Martian Ambassador August 1, 2017
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-Anti air flak, term used in World War I.
Ack-ack downed more planes than dogfights during the First World War.
by syrianarab May 24, 2005
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Noun: Stemming from the slang for "anti-aircraft" - A person who shoots another person's idea, thought, or feeling down.
Person 1: "How about Joe's Bar tonight?"
Person 2: "How about no?"
Person 1: "You, sir, are an Ack-ack..."
by DRoseMVP1235 May 3, 2011
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When an individual experiences an anal prolapse, and another proceeds to choke on it.
by Longathon Eggbert September 6, 2018
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Ack! is a meme spammed across 4chan boards, participially /tv/ and /pol/. The earliest known use of the meme was on September 8, 2021 by an anonymous user (who, in this case, was the OP of the thread) on /tv/. The thread depicted a GIF of a trans woman, who barely looked like a woman, hanging herself in hellfire. The description simply read “ACK!”. Variations of the meme include /pol/ack and yellow dog (who is meant to symbolize a mod).
by Cosmic Lugger January 16, 2022
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