undershirt

noun

1. An undergarment worn beneath a shirt, often collarless and sleeveless.

   “And she’ll say, “Ooh, look at my baby’s undershirt! What sweet little sockies! What clothesies does my little one want?” ‘All perversion I see! And this lady, doesn’t she have any children?’”

   “An undershirt absorbs moisture from your body and equalizes your body temperature.”