rabbit on vs mouth off

rabbit on and mouth off both are verbs.

Word	Noun	Adjective	Verb	Adverb
rabbit on	No	No	Yes	No
mouth off	No	No	Yes	No

As verbs, rabbit on and mouth off are synonyms defined as:

rabbit on and mouth off: talk in a noisy, excited, or declamatory manner

Other synonyms of rabbit on include jabber, rant, rave, spout.

rabbit on (verb)	mouth off (verb)
talk in a noisy, excited, or declamatory manner	talk in a noisy, excited, or declamatory manner