The lack of attached sleeves on a garment worn on the upper body, often revealing bare shoulders and arms.
On pixiv, the tag アメリカンスリーブ (American Sleeve) is used to denote a kind of sleeveless clothing where the armholes are cut near the base of the neck to the lower armpit, leaving a large portion of the shoulders bare. This is also typically a sleeveless turtleneck.
Sleeveless is mutually exclusive to strapless; they should NOT be used together to describe the same clothing. Use sleeveless ONLY if the clothing in question is not strapless and is not designed with a low, wide-cut neckline (such as off-shoulder shirts).
