What it means
In Irish slang, a wagon is a woman who's being a proper pain to deal with: moany, rude, loud, cutting, or just draining the life out of the room. It's usually an insult, but mates can toss it around in a half-joking way too. Not the same as on the wagon, which means you're off drink.
Usage examples
"She spent the whole gig giving out about the rain and the queues. Everyone was wrecked, and she was still roaring. What a wagon altogether."
"She gave out about the food, the music and the taxi the whole way home. Pure wagon."
"Don't mind her, she's only being a wagon because her team lost."
"She started giving out to the barman because the ice had melted. Absolute wagon."
"Ah leave it out, you're being a fierce wagon over one tiny delay."
