When one applies rootbeer flavored chapstick to his phallus, or dick, or anything really. For the function of lubricant, and to make blowjobs/ass-to-mouth more desirable, and delicious!
Stacy: I want it in my ass!
Steve: Give me a second, baby. *Applies chapstick*
Stacy: What are you doing?
Steve: Chapstickin' the ass.
Steve: Give me a second, baby. *Applies chapstick*
Stacy: What are you doing?
Steve: Chapstickin' the ass.
by OrangeOlives November 29, 2011
Get the Chapstickin' the assmug.