Up me arse picking daisies
Featured in The Déise Dictionary
An unfortunate expression used to sarcastically stress that one does not know where somebody is.
Biddy: "Where's mammy?" Peggy: "Up me arse picking daisies!"

Ah, a person of taste, I see. Would you like me to translate 'Up me arse picking daisies' in use for you?
'Where is Mother?' 'I have not the faintest idea, picking daisies up my posterior!'
Any good?