Shirt is a garment for the upper body, typically with a collar, sleeves, and buttons down the front.
Common types of shirts include:
1. Dress shirt - formal shirt usually worn with a tie
2. T-shirt - casual short-sleeved shirt without buttons
3. Polo shirt - collared shirt with two or three buttons
4. Flannel shirt - warm shirt made of flannel fabric
Idioms with "shirt":
- Keep your shirt on (calm down)
- Lose one's shirt (lose everything)