You say this word as a curse when you start to say the word 'shit', but mid word something happens that makes 'fuck' the more applicable of the two words so you finish your started 'sh-' with a 'fuck', thus resulting in 'shfuck'.
There's a cop behinds us, oh shfuck! He's pulling us over.
by VanillaNinja13 July 2, 2011
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The action of shiting while receiving or giving sex
Logan was shfucking me this morning it was delightful
by xX_Meatpie69_Xx March 14, 2017
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