Top definition
On a driveway (often covered with newspaper for easy clean-up), one person lets diarrhea drain from them while another person pours fresh diarrhea into his/her mouth, possibly through a funnel. A cooperative act.
Harvey went for a jog around the block to warm up before Brad helped him with his Tijuana Oil Change.
by helpfuladdition January 16, 2010
Get the mug
Get a Tijuana Oil Change mug for your brother-in-law Jerry.