chest-sock

\ ˈches(t)-ˈsäk\ : an undershirt meant to be worn under another garment.

This colloquial phrase is a gender-neutral and less-derogatory alternative to the term, "wife beater." Chest-socks are not meant to be seen or closely examined, which makes it acceptable to continue wearing them even after they have yellowed or developed holes from wear and tear.

It is, after all, just a chest-sock.

I was so embarrassed, but it got so hot in the office yesterday that I had to take off my sweater and work in an old chest-sock. Brenda pointed out that it had holes in the back!