used to refer to a person with a loose anus. Usually happens when said person has participated in copious amounts of anal sex.
by Anal Jim April 25, 2011

"Dude, that mexican food went right through me! When I got home I headed straight for the deuce caboose and dropped one, wait I mean two!
by Dustin Crew November 23, 2007

Any female that frequents the scumfuck bar The Loose Caboose (The Loose Asshole) in Lafayette, Louisiana.
Typically a college-aged female, but not necesarily college student, who listens to nu metal, has tribal tattoo(s), still wears the same Jncos bought from Gadzooks in 97', and has a myriad of issues that require her to take depakote or some other crazy person medication.
by POND SCUM October 1, 2004

While walking down the street, Allison noticed a caboose on the loose named Sam who was wearing shoes on her hands
by Allinella June 17, 2010

girl one: " I very much enjoyed your caboose mousse.
girl two: "did it come out too fast? Hurry, puke in my mouth."
girl two: "did it come out too fast? Hurry, puke in my mouth."
by aboozed February 20, 2011

by Peanut_Butter September 23, 2012

Verb - The act of recieving anal intercorse from a member of member of the clergy. The sex of either party is unimportant so long as the clergy member is allowed to perform the sacrament of commuinion. The eligibility of the recipient of the anal sex to recieve the sacrament of communion is not an issue in defining the act as a "caboose communion". Therefore, those recipients who are underage or do not themselves practise religion may still recive a "caboose communion'.
"They've been sending a lot of priests to the slammer for giving the alter boys the caboose communion."
by devilreyes February 22, 2007
