osoba, która nie umie przegrywać

Otherwise, they run the risk of looking like sore losers.

We should all be sore losers, as most of you are now.

"In the neighborhood where I grew up, we called that sore losers."

It would make him look like more a sore loser.

What on earth is wrong with being a sore loser?

Right, I could guess what they'd say; good friends and sore losers, every one.

You get one free, on account of you're a sore loser but too old to learn any better now.

But because he lost, everyone thinks he's just being a sore loser.

He is a sore loser, so no one likes to play with him.

How do you speak your piece without sounding like a sore loser?