I think they use it in the same sense that the word “dogpiling” can be used: > gerund or present participle: dogpiling > (of a number of people) jump on top o

I think they use it in the same sense that the word “dogpiling” can be used: > gerund or present participle: dogpiling > (of a number of people) jump on top of another person or one another so as to form a disorderly heap. "the players poured out of the dugout to dogpile on Wright at second base"