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:
get down
Meaning / Example:
1. Sl. to lay one's money on the table. (Gambling.) > Okay, everybody get down.
2. Sl. to concentrate; to do something well. > I'm flunking two subjects, man. I gotta get down. > Come on, Sam, pay attention. Get down and learn this stuff.