hit the wall

English

(informal) To experience sudden fatigue as a result of glycogen depletion, e.g. when cycling.
Synonym: bonk
(informal, seduction community) Of a woman: to lose her physical attractiveness through growing older.
- 2014, Lisa Scottoline, ‎Francesca Serritella, Have a Nice Guilt Trip (page 50)
  Don't tell Heather Locklear. She won't be able to hear you anyway, as she is over forty and will have to turn up her hearing aid. By the way, please note that, according to urbandictionary.com, men don't hit the wall.
- N. L. Shraman, How to Seduce a Girl? The Science of Seduction
  Ninety percent of girls hit 24, they hit the wall; 25 they hit the wall because they don't care take care^[sic] of themselves. They don't know any better because they hit their peak so young.

experience sudden fatigue from glycogen depletion