The phrase 'Kick Back' means to lean back and relax.
Example of Use: "I really like to kick back and relax when I'm not working or at school."
Interesting fact about Kick Back
The origin of the idiom 'kick back' as in “Kick back and relax!” isn’t known and first came into popular use in the 20th century; however the origin of the word 'relax' has its roots in the 14th century Old French. The word 'relaschier' literally means to soften, reduce, or set free and comes from the Latin 'relaxare' which means loosen, open, or stretch out.
