Lurgy
British SlangDefinition
A minor contagious illness—typically a cold or flu—used informally to mean feeling unwell.
Examples
"I’m going to skip the pub tonight—I’ve come down with the lurgy and feel absolutely rotten."
"Don’t touch my mug, I’ve got the lurgy and don’t want to pass it round the office."
"Half the class is off with the dreaded lurgy after that cold snap."