Fast worker American British noun phrase informal
Someone who accomplishes something quickly, especially in achieving their personal goals as profit, advantage, or romantic relationship
Although she was well aware that he is a fast worker, she followed him to his home.
He is such a faster worker. I was astonished to hear that he has recently been promoted from an employee to a management position after just 1 month in this new job.
The origin for this phrase is not clear.
A problem or difficult circumstance
I'm short-sighted, so forgetting my glasses is a real hair in the butter for my sight.