be lost on somebody
if something is lost on someone, they do not understand or want to accept it

[TahlilGaran] Dictionary of Contemporary English ▲

lost on
lost on (you)
not understood by you.
Civilization developed because ideas and technology were exchanged between cultures – a truth that is lost on many of us.

Usage notes: often used in the form not lost on someone - clearly understood by someone:
Increased airport security is now a fact of life, something not lost on passengers who put up with long delays.

[TahlilGaran] English Idioms Dictionary ▲

lost on
wasted or having no effect on someone
My attempt at telling a joke was lost on my former girlfriend.

[TahlilGaran] English Idioms Dictionary ▲

lost on someone
wasted or having no effect on someone
My attempt at telling a joke was lost on my former girlfriend.

[TahlilGaran] English Idioms Dictionary ▲