ARD

acronym for "All ready done"

Dude 1: Send me a invite to the discord server
Dude 2: ARD bro

yerr

Yerr is a shortened and anagramitized version of "You heard?" and is commonly used as slang when responding to someone or relaying a message again

Man 1: I'm going down to the groceries shop, yerr?
Man 2: Yeah, nah I'm good man
Man 1: Aight