missionary trip 

Dropping acid and then proceeding to have sex while tripping.

person 1: "Crazy night last night, huh?"
person 2: "Yeah, I went on a missionary trip."

missionary trip by jo_z June 2, 2015

missionary position trip 

Any of a large number of organizations that sponsor group youth trips during which pedophelia is practiced.

Hey, you gonna let yer kids go on the "our lady of great agony" outreach bus?
Umm, I think that's one of those missionary position trips where yer kids are pretty much guaranteed to get STD popped.

missionary position trip by YAWA May 4, 2021