DIV
n. countable C2 Proficiency div
n. a silly or stupid person. It is a casual, British word used to tease someone who has made a mistake.
n. a foolish or incompetent person. Primarily British in usage; carries a derogatory but often lighthearted tone in informal social contexts.
Don't be such a div, the keys are in your hand.
He felt like a total div when he realized he had been wearing his shirt inside out all morning.
Usage
Informal British slang; typically used as a mild pejorative in face-to-face interaction.