What it means
The state of being hopelessly clumsy on your feet, especially when dancing, as if neither foot knew where to go. Someone with two left feet treads on toes, misses the beat and somehow trips on a flat floor, all with good humour about it.
Usage examples
"I'd love to learn to waltz but I've got two left feet, the instructor gave up and just laughed."
"Don't ask me to dance, I've got two left feet and I'll only stand on you."
"He's brilliant on the pitch but on the dance floor it's two left feet all the way."
"I tried that TikTok dance and fully proved I've got two left feet."
"She's got two left feet at weddings, bless her, but she still gets up and gives it a go."
Where it comes from
The image is having no proper right foot to lead with, just two left ones tripping over each other. Someone with two left feet treads on toes and misses every beat on the dance floor, usually laughing at themselves along the way.