1
general::
Also, get it. Receive a punishment or scolding, as in If I forget anything on the shopping list, I'll catch it, or I'm really going to get it when I turn in my paper late. [Colloquial; early 1800s]
American Heritage Idioms
2
general::
Phrase(s): catch it
to get into trouble and receive punishment. • I know I’m going to catch it for denting mom’s car when I get home. • Bob hit Billy in the face. He really caught it from the teacher for that.
McGrawhill's American Idioms And Phrasal Verbs