Top definition
I dont believe you, often used in text or internet language among young people.
John: I'm going to America tomorrow to eat in McDonald's.
Patrick: idby!
by eefa December 27, 2007
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2
This has two meanings. It can mean "I don't believe you" or "I don't blame you". Just the same abbreviations.
Max: I just met a celebrity 5 minutes ago!!
Sam: Really? No, bruh... Idby (I don't believe you.)

Or

Max: I'm very worried about my girlfriend. she hasn't texted me in days.

Sam: I would be worried too. Idby (I don't blame you)
by Black Dwarf Bunny January 20, 2018
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