Meaning of the word "at the drop of a hat" in English

What does "at the drop of a hat" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

at the drop of a hat

US /æt ðə drɑp əv ə hæt/
UK /æt ðə drɒp əv ə hæt/
"at the drop of a hat" picture

Idiom

immediately; without delay or hesitation

Example:
She's always ready to go on an adventure at the drop of a hat.
He'll quit his job at the drop of a hat if a better opportunity comes along.