get lost (in something)
to be forgotten or not noticed in a complicated process or in a busy time

[TahlilGaran] Dictionary of Contemporary English ▲

get lost
go away.
Those kids told the new girl to get lost.

Usage notes: sometimes used as an order:
Get lost, Gary. We don't want you coming with us.

[TahlilGaran] English Idioms Dictionary ▲

Get lost!
[very informal]
something that you say when you are annoyed with someone or you want someone to go away.
Oh, get lost! I'm not in the mood for your jokes.

[TahlilGaran] English Idioms Dictionary ▲

Get lost!
Go away!
The girl told her brother to get lost so she could finish doing her homework.

[TahlilGaran] English Idioms Dictionary ▲

get lost
v. phr., slang Go away!
■ Used as a command.
Get lost! I want to study.
John told Bert to get lost.
Compare: DROP DEAD.

[TahlilGaran] English Idioms Dictionary ▲