CHILLAX
Etymology
Verb
chillax (third-person singular simple present chillaxes, present participle chillaxing, simple past and past participle chillaxed)
(intransitive, slang) To relax; to be laid back.
(intransitive, slang) To calm down.
(intransitive, slang) To behave.
Synonyms
• (relax): chill out, relax, unwind
• (calm down): calm down, chill, cool it
• (behave): be good, behave (oneself)
Antonyms
• (relax): get worked up, stress oneself (out)
• (calm down): get riled up
• (behave): behave badly, misbehave
Source: Wiktionary