The elevator doesn't go (all the way) to the top British humorous informal
Used to imply a person who is not smart, stupid and dumb.
My girlfriend sold her house to satisfy her shopping demand. You know, the elevator doesn't go all the way to the top.
He thinks that falling in love with a rich girl will make him famous. The elevator doesn't go all the way to the top.
She plans to quit her job at this company and move to the one I'm working under a lot of pressure. The elevator doesn't go to the top floor.
The origin of this expression is not clear.
A humorous way of saying that what one has said is just what they acknowledge and may not be entirely accurate
Mike: Have you returned from your vacation on the beach? Your skin seems to get tanned.
Jenny: My skin is always dark. That's my story and I'm sticking to it!