Diplomacy

[Jessica]

The art and practice of conducting negotiations between
nations (particularly in securing treaties), including the methods and
forms usually employed.

[Jessica]

The act of telling someone to go [to hell] in such a way that they look [forward] to the [trip].

[Dianne]

An awesome Avalon-Hill [board game] of strategy, tactics, negotiation, and (best of all) backstabbing.

Players play any one of 7 pre-WWI European countries and try to take over the rest. Gameplay can be best described as a cross between Risk and chess. Risk, because of the map-based, [multi-player] world domination aspect, chess, because the strategies are complex even though the rules may be simple. In addition, like chess, Diplomacy is the only other board game with popularity in the play-by-mail or play-by-email form.
A [backstab] is often abbreviated as stab.

[Sarah]

The ability to be able to say [Good dog] while [reaching] for a [beat-down] stick

[Kit]

Is the ability to tell someone that they are [full of shit] and having them fully understanding and agreeing with you before youve finished explaining why.
Knowing how to sound like you [agree] with an opposing view while tactfully bringing the [opposition] around to your way of thinking.

[Merna]

The are of [letting] [someone else] have your [way].

[Raeanne Dimick]

Resisting the urge to slap someone in the face and yell, Liar!
This is a quote from Susie Madrak, aka Urban [Guerrilla], as posted at [Crooks]

[Tanya Shivari]

[Vague] threats [balanced] by obscure [promises] and photo-ops.

[Oralee]

The profession, activity, or skill of managing international relations, typically by a countrys representatives abroad.

[Raeanne Dimick]

[a bullshit] [deal] that later gets [broken]