To feel indisposed
I understand that Mr White is feeling under the weather today, so you folks are going to have to be making do with me today.
by LuizLeitao April 29, 2015

This is the British middle class equivalent of the exclamations 'ill' or 'sick', meaning cool. Being terribly modest and reserved, one doesn't want to overstate things.
by Bob Q. Holness August 26, 2008

by Cypress February 11, 2018

by Under the Weather September 8, 2025

Past tense of being under the weather.
by ptyinssndksbrbra October 11, 2022
