Complex sentence: The term "mob" carries a connotation of a crowd with an (often angry and sometimes riotous) agenda, however the term "mobbed" simply means "extremely crowded", as in a busy mall or shop.
Split into simpler sentences: The term "mob" carries a connotation of a crowd with an (often angry and sometimes riotous) agenda. In human sociology, the term "mobbed" simply means "extremely crowded", as in a busy mall or shop.