sport shirt

noun

a long- or short-sleeved soft shirt for informal wear by men, having a squared-off shirttail that may be left outside the trousers, usually worn without a tie.

Also, sports shirt.

Compare dress shirt.

Origin

1915-20

Examples from the web for sport shirt

Informal means coat and tie, casual means sport shirt and slacks.
He'll always be a parish priest, whenever he turns his collar backward, because you always sense a sport shirt underneath.
He was barefoot and barelegged, wearing only floppy khaki shorts and a checked sport shirt, its tail tumbling outside.
He wore a blue pullover sport shirt and blue jeans, white leather sneakers on his feet.
In a sport shirt on his way to catch an airplane that was being held for him.