A combination of a jumper and a shirt made by sewing just the neck area and collar of the shirt into a v-neck jumper. Traditionally worn by people of a lazy persuasion who would otherwise be demonstrably adverse to ironing.
"You're lookingsignificantly smarter than usual, it really looks like you've made an effort Patrick." "That'll be my new jirt."
A tee shirt that is made to look like a professional sports teams uniform. This retains the classiness of the original uniform, but at a much more reasonable price.