Originated From The Character 'Ferb' From 'Phineas and Ferb' Who Seems To Say One Line An Episode And Just Stands There.
Knob: Joe, Jessica, Jeff, Jennifer, Oh Yeah And Jack Ferb-ed.
Bob: Oh God, Who Invited Him
Knob: No-One, The F**king Ferb Heard About It On FaceBook.
2. A FeRB is a big brother/sister who constantly aggravates and intimidates a younger sibling.