t shirt, n.All

The t-shirt was invented in 1904. It was marketed to bachelors who couldn't sew or replace buttons.

A T-shirt is a portable personal billboard, emblazoned with a suitable commercial logo or message that creates an instant identity for the wearer and proclaims it to the world.

A T-shirt is a personal billboard which, in its unadorned state, is considered an article of underwear.

The T-shirt is the Alpha and Omega of the fashion alphabet.