Should have indicated it was Beck.
To Be Onto (someone Or Something) Idiom American Expressions and American Idioms - What does To Be Onto (someone Or Something) Idiom mean?
to be onto (someone or something)
What does to be onto (someone or something) mean?
to have discovered the truth about someone or something
My supervisor in onto the new saleswoman who is taking money from her sales register.
- For Teachers