An acronym given to only the holiest prophets of the church of COVID. It means “masks be upon him.” Important side note: MBUH does NOT mean “mask be upon him”. That implies one singular mask, and one mask is simply not enough to stop COVID from killing grandmas.
Person 1: praise Lord Fauci (mask be upon him)
Person 2: Dude stop spreading misinformation. You know wearing only 1 mask can kill trillions of grandmas. Say Masks be upon him or MBUH for short.
by ilovetrump2024 September 7, 2021
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a laugh when something is not funny; a sound made when a joke or sarcasm is a flop; a laugh you can use after someone tells a joke they think is funny when its not; a response to a comment made by a douchebag, dick, or bitch.

can be pronounced differently in different situations; for example if something is really ridiculous you can hold out the mmmmms (mmmmmbuh) or put a bigger emphasis on the B. Should be said in a low voice.
person: "you must be a fan of mine"
me: "mbuh!"

person: tells a bad joke....etc
me: "mmmmBuh!"
by Kessler21 July 27, 2011
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an Indonesian slang, another way to say "no" or "i dont want to"
"can you help me with my homework pls"

"mbuh"
by arinala December 27, 2022
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