A misfit; an inconvenient and intractable person: They were square pegs who weren't succeeding
[1901+; fr the earlier expression put or drive a square peg in a round hole, fr carpentry or joinery]
But, it's kind of like trying to fit a square peg in a round hole.
But “economic diversity” is a square peg in a round hole, no matter how you feel about round holes.
The pair, he said, looked out of place in the wilderness, “like a square peg going into a round hole.”
But for a long list of reasons, this is a square peg and a round hole.
I fit into this life out here, like a square peg in a round hole.
As a gunner subaltern he had been a square peg in a round hole.
No matter who asks you, refuse to be a square peg in a round hole.
"He's a square peg, all right," he muttered, more to himself than to his companion.
A square peg in a round hole; a man with every natural attribute of a master of men.
As to what particular round hole his square peg could fit he was most vague.