shirt-sleeve

American  

[shurt-sleev] / ˈʃɜrtˌsliv /

Or shirtsleeve,

adjective

1. not wearing a jacket; informally dressed.

   a shirt-sleeve mob.

2. warm enough to live or work in without wearing a jacket or coat.

   shirt-sleeve weather in November.

3. simple, plain, and informal; direct and straightforward in approach, manner, etc..

   shirt-sleeve diplomacy.

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Etymology

Origin of shirt-sleeve

First recorded in 1560–70

Example Sentences

In a surprising gesture, the bespectacled monarch was seen seated in a chair, coat off, suspenders showing, and shirt-sleeve rolled up, with his arm at the ready to donate blood.

From Washington Times

The afternoon’s high, which enabled relaxed shirt-sleeve strolling, was reached after a 27-degree climb from the morning low of 49.

From Washington Post

The slider spun and hung in the middle of the plate, where Voit and his shirt-sleeve ripping arms were happily waiting to pounce on the gift.

From Seattle Times

The re-opening of T-Mobile Park on a perfect shirt-sleeve Friday night felt like a gauntlet of melodrama for those playing and watching, including irascible anger toward the umpiring crew and their treatment of reliever Hector Santiago.

From Seattle Times

That’s shirt-sleeve weather compared to what we’ve been enduring and will invite everyone to get outdoors for some fresh air.

From Washington Times