Bulljack means: Similar to Bullshit, but it’s safe to assume that the PG crowd is more common. Noun Insulant, arrogant talk or something that is worthless in nature. Language that is foolish. Bulljacking verb, verb bulljacked To engage in idle conversation that has little or no meaning. A deliberate attempt to deceive or mislead. Interj. Exclamation for dissatisfaction. (in Community Dictionary, added by Gage Ferrell)