When you jizz, shit, piss, yawn, sneeze, fart, burp, and throw up at the same time. Than you put it in a blender and shove into your girlfriend's vagina. If you don't have a girlfriendstick it up your ass.
gaggle is defined as a group of geese on the ground. Thus gaggle fuck means something similar to a cluster fuck. And as you may know a cluster fuck refers to something that is unorganized. So gagglefuck means something that is unorganized