Its when you are getting head in one of the many hot tubs on Carnival cruise lines and you don't let her up for air until your yogurt floats or is swallowed.
Hey guys, you see that Latino over there, we just went on a Carnival underwater excursion. It was great.
by blmaxim February 7, 2006

Did you hear about John and Amanda? Their on there spontaneous weekend excursion! I think they went to California.
by birse18 July 8, 2009

A short trip taken by pot smokers while high, usually to purchase snacks or to acquire more marijuana.
by blazin420copscantcatchme August 29, 2017

by OutsideLightAKAbigLeg April 18, 2018

by OutsideLightAKAbigLeg April 18, 2018

Power-plant manager: "Yeah, we had a nuclear excursion last night..."
Power-plant worker: "He means, we barely avoided leaking millions of litres of highly irradiated water vapour into the atmosphere."
Power-plant worker: "He means, we barely avoided leaking millions of litres of highly irradiated water vapour into the atmosphere."
by o_alquimista January 3, 2022
