Maybe it's not really called a trianglomo, but it should be. Call it what you will, it's pretty damned magnificent. Some buster thinks he's about to beast-master his way through your triangle attempt, and instead ends up on some crazy omo-type shoulder torture contraption. Imagine that. Yeah.
Check out this very trick omoplata variation that you can catch off a soon-to-be-bustsed triangle from BJJ black belt and instructor, Johnny Ramirez (New Breed Academy in beautiful Santa Fe Springs, CA). It requires some amount of wherewithal and sophistication, but we think you can handle it.
Go snap some shoulders, grapplers!