Do the dirty on and Rat on

Rat on and do the dirty on are semantically related In some cases you can use "Rat on" instead a verb "Do the dirty on".

Rat on verb - To give information (as to the authorities) about another's improper or unlawful activities.

Do the dirty on and rat on are semantically related in tell on topic. Sometimes you can use "Do the dirty on" instead a verb "Rat on". informal substitute