Can of wee wee
Heard in Waterford
A metallic cylindrical container with contents of human bladder inside. Term generally used to describe one who frequently goes head first into situations for which they are ill-equipped both in intelligence and experience.
Would ya look at yer man over tryin to sort things out with the guards - he's some can of wee wee!
Would you observe that fellow attempting to resolve matters with the constabulary, he is a vessel of foolishness.