It turned out that he had been lying about his alibi.
sell out
Frequency:
80
%
He was accused of selling out his principles for money.
rat out
Frequency:
70
%
He didn't want to rat out his friends, so he kept quiet.
snitch out
Frequency:
60
%
She decided to snitch out the thief to the police.
Idiomatic Expressions for dime out
Phrase: dime out on someone
Meaning: to fail to provide support or assistance to someone in need
Usage: I thought he was my friend, but he dimes out on me when I needed help the most.