0 a style of wearing a shirt, jumper, etc. partly tucked in (= pushed into the waist of your trousers, skirt, etc.) at the front but hanging out at the back and sides:
1 to wear a shirt, jumper, etc. partly tucked in (= pushed into the waist of your trousers, skirt, etc.) at the front but hanging out at the back and sides:
Thanks to the show, everyone is obsessing about the French tuck.
If there's one thing the show taught me, it's how to French tuck.