Deletion of Pile-on

Comment: I believe it's quite a common term, but I can't find any reliable sources, so delete per  and  unless some reliable sources can be found
Stance: delete
Cited policy: Wikipedia:Verifiability (WP:V||WP:NEO)

Comment: as according to 
Stance: delete
Cited policy: Wikipedia:Wikipedia is not a dictionary (WP:NEO)