Quite a/some somebody/something phrase informal
Said when you mean that person or thing is particularly important, remarkable, impressive, unusual, etc.
He's quite some strength and courage.
Despite his young age, he has already achieved quite some achievements.
We had nothing but praise for quite a performance he had given.
Eliud Kipchoge is quite a runner. He is the first person to finish the marathon under 2 hours.
The origin of this phrase is not clear.
Used to refer to a person who is your enemy
He faced his sworn enemy.