its a combination of chill and relax or chillax. but put in to the verb form. a chillaxitve can also be something. what ever makes you relax- puts you in your happy place- ex. weed, sleep...
Abhi: i have 5 test tmrw im freaking out!!!
Sean: Dude juss take some chilaxitive and sit down...Bitch!
Sean: Dude juss take some chilaxitive and sit down...Bitch!
by Sean N April 21, 2004