beats me

(idiom) I have no idea

Example Sentence:

A: What is the capital of Canada?
B: Beats me.
A: Try and guess.
B: Toronto?
A: No, it’s Ottawa.

Boyfriend: What time does the movie start?
Girlfriend: Beats me.
Boyfriend: We’d better find out or we will be late.

Similar idioms:

1. shoplift
2. touch base
3. what do you say?