Phrasal verbs consists of a basic verb + another word or words. The two or three words that make up a phrasal verb form a short 'phrase' - which is why we call them 'phrasal verbs'.
Phrasal Verb:
rinse someone's mouth out (with soap) and wash someone's mouth out (with soap) Fig.
Meaning:
to punish one by washing one's mouth out with soap, especially for using foul language. (Usually a jocular threat.)
Example:
If you say that again, I'll rinse your mouth out with soap.