Acronym for Adolescent Retarded Fool. Someone who is an ARF is someone who is immature, insecure, stupid, slow-witted, overconfident, and completely convinced of their own superiority, without having any merit whatsoever.
Friend 1: "Did you hear what that guy was saying to his girlfriend? What an ARF!"

Friend 2: "Yeah. He seems like a real tool."
by ThePotatoFish December 22, 2019
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Person 1: Omg this person fell over in this video.

Person 2: omg that’s arf!
by Poricbne April 5, 2023
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alt emo girls trying to be funny; weird
"DW BESTIE ITS OK ILL BARK AT HIM FOR YOU, ARF ARF."
by smegsy girl January 3, 2022
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Originally thought to have been a conjoined twin at birth, Arf's Dong is so large that it is typically used to describe how big or small something is in relation to his unit. Experts state that whenever an erection is formed his heartrate increases roughly ~300% in order to compensate for the blood loss in his brain as well as maintain his throbbing member.
Wow! Did you see that giant pile of elephant shit?
YEAH! It was almost as big as Arf's Dong!

or

I'm not so sure it would fit.. Sure it will. If Arf's Dong could fit, anything can!
by RareMojo September 21, 2021
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A phrase to inform someone of their hot headedness
" If man are getting a bit too hot headed, they need to cool arf"
by BBGWAG June 5, 2021
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