A contraction of "should not have." It can be punctuated many different ways (ie. should'nt've, should'ntve, shouldn't've, etc)
by hedfones February 18, 2009
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Get the shouldn't've mug.shouldn't've should not have, shouldn't have is a word invented in Upwey, Victoria, Australia on 15th August 2018 by Jason Veenman following fabricating an axe handle from a canoe oar. The handle broke with the first strike of the splitter axe to the target wood upon which Jason remarked "I shouldn't've bothered. I'm going to buy a proper axe from the hardware store"
by Jason Veenman August 14, 2018
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