Blow the gaff on and Rat on

Rat on and blow the gaff on are semantically related. In some cases you can replace term "Rat on" with "Blow the gaff on", this phrasal verbs are similar.

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

Blow the gaff on and rat on are semantically related. Sometimes you can replace term "Blow the gaff on" with "Rat on", this phrasal verbs are similar.