MBD means “Make Bad Decisions”. This acronym is only used and to only be told to a person when someone should make a bad decision.
Your girlfriend is in another state and you see all these other girls so go MBD”
by Demarcus Barthalamew November 9, 2022
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Short for "mysterious black dude", the character who briefly appears in the trailer for Metroid Other M. Dubbed this title by the community of the gamefaqs forums, he is known for his famous line "Remember me?" and has been the subject of several pictures and videos.
Guy 1: Who's that character in the trailer?
Guy 2: It's the MBD!
MBD: REMEMBER ME?
by blighboy June 16, 2009
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Mad Beaver Disease. This is the beaver version of mad cow disease. The conditions include random, uncontrolled spasms which lead to violent attack of all things surrounding the subject. First encountered in the Panania area and in the local beaver stock. Currently there is no known cure.
"That beaver must have MBD he just tackled a computer."

"They better find a cure for MBD quick."
by D.E March 18, 2004
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mental break down ; when someone’s been crying
I just had a mbd because I’m dog died
by keylalc December 5, 2018
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MBD stands for "my bad, dog" usually used apologetically or sarcastically following some sort of conflict or confrontation about some incident that recently occurred. i.e. An outburst from another party.
Tim: You just slammed the door in my face!
Jon: Oh, I didn't see you! MBD!
Tim: No worries, man.
by KylieKarnage July 1, 2011
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Short for "My bad dude(s)"
Gio: C'mon Jackie, that's just a skip-it!
Jackie: MBD...
by J.Lee May 22, 2005
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An mbd is when you let all your emotions build up to the point where they all burst out at once. You cry & you scream and everything bad in your life seems to be piled up into one. There's almost no way to calm down at the moment , but you'll soon realize that was a sense of relief. Mbd's could be prevented by talking to someone YOU TRUST about your problems regularly, rather than keeping them to yourself. Mbd's can last 20 minutes or days. If you're having mbd's regularly for about a month or more, its depression. Stay positive!
by beautiful peach June 16, 2017
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