The shirttail (also spelled "shirt-tail") is the bottom part of a shirt (especially a [[dress shirt]] or [[collared shirt]]) that would normally be tucked below the waist of the lower garment.   This becomes visible if the shirt is [[untucked_shirt|untucked]], or if the lower garment is [[no pants|missing]], [[skirt lift|lifted]] or [[upskirt|seen from below]] at a low angle (for [[skirt]]s particularly in the latter two examples).


h4. External links:
* "Merriam-Webster: Shirttail":[https://www.merriam-webster.com/dictionary/shirttail]
* "Wiktionary: Shirttail":[https://en.wiktionary.org/wiki/shirttail]

h4. See also:
* [[dress shirt]]
* [[collared shirt]]
* [[whale tail (clothing)]]: A tangentially similar case where the  underwear is visible above the waistline instead of the shirt visible below it.
シャツの裾 ワイシャツの裾