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