underbutt

English

Two young women posing in very short shorts in 1945; the bit of buttcheek that such shorts reveal is sometimes called underbutt.

Etymology

From under- +‎ butt, by analogy with underboob.

Pronunciation

• Audio (US):

  (file)

Noun

underbutt (plural underbutts)

1. (Canada, US, informal) The lower part of the buttocks, especially as revealed by certain clothing such as skimpy shorts.
   • 2009, Karon Karter, The Ultimate Body Shaping Bible, page 116:

     Strengthens and slims your underbutt!

   • 2010, Shauna Niequist, Bittersweet: Thoughts on Change, Grace, and Learning the Hard Way, page 92:

     Most of the time it's just like any other dressing room, and I try not to cry when I'm forced to confront my underbutt under the bluish fluorescent light the three-way mirror.

   • 2017, Beth Behrs, The Total ME-Tox: How to Ditch Your Diet, Move Your Body & Love Your Life, unnumbered page:

     My struggle is with my underbutt. Not my butt, but my underbutt, that chunk between the butt and the legs.

Synonyms

• underbum (UK)

See also

• muffin top