Pronunciation: [t͡ʃˈɪl ˈa͡ʊt] (IPA) 
The phrase "chill out" is typically spelled with two words, "chill" and "out." The first word, "chill," is pronounced /tʃɪl/, with a "ch" sound followed by a short "i" sound and a silent "l" at the end. The second word, "out," is pronounced /aʊt/, with a long "o" sound and a "t" at the end. Together, "chill out" is a casual way to tell someone to relax or calm down.
Chill out is an informal phrasal verb that refers to relaxing, unwinding, or calming down in a casual or leisurely manner. It is commonly used in colloquial and casual conversations.
In terms of emotions or mood, to chill out means to alleviate stress, tension, or anxiety and instead adopt a more calm and relaxed state of mind. It implies letting go of any worries or pressures and simply enjoying the present moment. It often involves finding a quiet or comfortable place, engaging in activities that promote relaxation, or simply taking a break from the demands of everyday life.
In social contexts, chilling out usually refers to spending leisure time with friends or engaging in recreational activities without any particular agenda or purpose. It suggests a laid-back and carefree attitude, where one can simply hang out, chat, listen to music, watch a movie, or engage in any other activity that brings a sense of calm and enjoyment. It is commonly associated with informal gatherings, casual get-togethers, or low-key events.
Overall, to chill out encapsulates the concept of finding inner peace, tranquility, or contentment by disengaging from stressors and embracing relaxation. It conveys an attitude of ease, comfort, and positivity, often sought after to counteract the demands and pressures of daily life.
The phrase "chill out" is believed to have originated in the United States during the 1970s. It is derived from the word "chill", which in this context means to relax or calm down. The term "chill out" gained popularity as a slang expression, particularly in American English, and it has since become a common phrase used to encourage someone to calm down or take it easy.
