This is the 12713th most frequent Russian word.
косяки
"Косяки" can mean "jambs" (as in door jambs) or "mistakes/flaws," depending on context.
Here, 'косяки' refers to groups or schools of fish.
На пляже я увидел косяки рыб, которые плавали вдоль берега.
At the beach, I saw schools of fish swimming along the shore.
In this context, 'косяки' refers to errors or mistakes.
Он совершил несколько косяков на экзамене, но всё равно получил хорошую оценку.
He made a few mistakes in the exam but still got a good grade.
Here, 'косяки' refers to inconsistencies or deficiencies in plans or projects.