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1.
An Irish, inner city Dublin slang word meaning:

"The state of you"

"You are disgusting"

"Ugly" etc.
Example 1- Girl: do ye like me new dress? Just bought it in penneys.

Girl 2: no, da bleedin hack of ye!

Example 2- Boy: ugh I was so in bits last night

Boy2: I know, u shifted dat bird and da bleedin hack of her
by Daffodildo January 05, 2014