kevin was too frightened to go for an [irish shave] at the snooker club after he heard keith had recently been questioned by the police on suspicion of black-'n'-deckering
drilling a hole between cubicles in a public lavatory in order to spy on one's neighbour
"kevin was too frightened to go for an [irish shave] at the snooker club after he heard keith had recently been questioned by the police on suspicion of black-'n'-deckering" What is the definition of "black-'n'-deckering"?