After reading these responses, I guess I should reform what I consider a “dirty stopper” is. Growing up, I always referred to the horse I rode the jumpers on the Florida circuit as a dirty stopper…but now I am not so sure that is fair to him (maybe he was just a non-dirty stopper).
With him, I always knew the types of fences he would stop (the outs of combinations). Some days he would be fine, others he would stop without warning, lowering his shoulders and slamming on the breaks into the fence. I guess that does fit the description of dirty, but I was always prepared for the possibility. I guess it doesn’t help that he was a 15.2 hand appy jumping the level 5s and he didn’t quite have the step for some of the longer combinations which would scare him (probably a better rider than my teenage self could have helped him out, but alas he was stuck with me)…he had the scope in spades, but his legs were too darn short. It’s a shame, because years later and $$$ horses later I still consider him the best horse I have ever owned.