Saying this means you are an autistic, retarded, hot-headed child on ROBLOX.
kid: “Mic Up!”
Me: “We already know your a child, so shut up.”
by Experimental Waters December 19, 2020
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This word is used when some Roblox slender/cnp on vibe or voice chat games ask you to join on discord to argue.

However, they just stay quiet and use the chat the whole entire time you wreck them.
Kid mic up lol I got the pro
by ​ᗢ December 17, 2021
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Something Roblox Players or other games say when their skill does not Account to the shit they talk in chat so they need to solve it verbally because they're trash at the game and salt. In Some instances, it leads to Discord packing.
"Oh I'm a Noob? Mic Up. Mic Up bitch. My Discord is DogshitAtSpecifiedGame#9999"
"Aight Bet"
by BookieMcDookie January 7, 2021
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A dumb word that kids use “mic up” when their pressed and trying to act cool around you, mostly ro-gangsters or wanna be copy and paste used in the games “da hood” “ragdoll” Then when they would ask you they’d invite u to a group on discord with like 8 of there friends 💀
Ayomic up” kid drop your cord
by puta;) May 12, 2021
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The saying of "Mic up" is from ROBLOX where dumbass slenders and fucking copy and pastes have nothing to shit on you about when they literally mumble within every sentence. Mainly 50 year old slenders use it, but also the 6 year old "emo" kids also use it. They like to play ragdoll engine and club iris. They use it if they have nothing they can try and make you sad about, so they try to insult your voice on discord instead. Even though their voice sounds like a fork screeching against a plate if they're a 6 year old girl. their voice sounds like Jeffrey Epstein if they are a 50 year old slender.
Slender or 6 year old emo: Mic up kid.
Regular person with a fucking brain: No, since you have nothing to insult me with you fucking loser.
by Dont come at me 834738 January 10, 2021
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Usually used in the game "ROBLOX" when a user gets so pissed off in argument they want to mic up.

The usually mic up in the voice chatting app , "discord".
rogangsta: " bro mic up psy mic up say that shii in vc psy"
me: "OH SHII I GOT LEAVE BRO THIS MAN SCARY"
by Myweeweeisgettingbiggerevryday December 7, 2020
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if someone tells you that in roblox, they want your discord username
by nookslol September 9, 2020
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