The definition of muckleboob is big idiot. The word itself is defined by combining Muckle which is an ancient scottish word meaning "Large amount" and boob, which is a dullard, oaf, or useless person. It can also be used to describe a disasterous outcome.

Personal Description: That guy is a real Muckleboob

Outcome: This job should have been easy, but now it's a real Muckleboob.

Muckleboob by Hong_Kong_Phooley December 13, 2012

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macklemouth

having a mouth like Macklemore. overall a wide apendage, having full beige lips that blend back into the face

Chris Pine has a macklemouth, and so does Macklemore

macklemouth by pretz March 25, 2013

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Macklemore

A white rapper from Seattle who actually raps about something that means something. Not like all the other 'rappers' who think that sex, drugs, and money will really have people respect them. Macklemore often collabs with Ryan Lewis and is generally a well known mc in the West, and anyone who meets him is a lucky son of a bitch.

John: dude I just met Macklemore yesterday!!

Britt: no way, how come you didn't take me with you! now I have to wait till he comes back to town! You lucky sob.

Macklemore by Kendeeeeeeezille April 28, 2011

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