Callblock of Duty is the widespread phenomenon of rarely being able to reach someone via
phone while they are gaming, regardless of their choice of console (or PC) and irrespective of which
game they may be playing. It is, however, particularly prevalent in serious Xbox gamers, specifically those who frequently play one or more of the Call of Duty
game series. Your call will most likely ring all the way through to voicemail, as even the simple act of hitting the "Ignore" key on a cell
phone might
break said gamer's concentration and/or compromise their strategy/position. If your call goes directly to voicemail, said gamer has most likely already received and declined to answer several calls, triggering the automatic voicemail response feature of most cellular carriers, or he/she has actually turned the
phone off to avoid further interruption.
A: "
Hey, is Matt coming or not? We've gotta leave soon or we're going to miss the movie!"
B: "Probably not. He must have activated Callblock of Duty; I can't get him on the
phone. We should just go... He'll call me back in
like 6 hours."