The phrase "soz yer beast" is slang for "sorry you beast" which derives from the term "My sincere apologies" or the latin 'mia culpa'.
I believe that the term originated in the north-westerly English town of Warrington and is sort of a Warringtonian apology.
The phrase was most commonly used amongst teenagers between the years of 2004-2007 AD.
"MATE. I atch just seen you lookin at me bird."
"Oh, soz yer beast!"
by colesontoast January 16, 2011
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