be lost on someone
idiomPart oflost
be lost on someone — idiom
1. If something such as a joke, remark, or explanation is lost on someone, they do
1.idiom
Definition
If something such as a joke, remark, or explanation is lost on someone, they do not understand or appreciate it.
Example
The humour of the situation was lost on Christopher, who was too tired to find anything funny.
Her advice about saving money was lost on the teenagers, who spent everything they earned.