1).
Verb - to bemoan
irrelevant topics while being snobbish and methodically ignoring all reason.
Originates from yelp food reviewers.
2).Verb - to think that everyone who disagrees with you knows nothing and only you know the
truth.
"do you want to listen to me or you
gonna keep yelping about how everyone is stupid?"
Practically everyone on the social
media is yelping.