Take it or Leave it

Maybe the most aggressive tactic for a negotiator to take is to say “take it or leave it”; this stance is cocky, unequivocal, and mean. Aggressive negotiators use this tactic because weaker negotiators give in and it works. Yet, many times it is just a bluff.
This tactic sends a strong signal that the aggressive party has a strong BATNA (i.e. other options if this agreement does not come together). At least that is what they want to believe. They will say things like, “This is the best I can do. You can take it or leave it”. Frequently, they will also have a short deadline for you to respond, which is yet another aggressive tactic. They will say, “I need your answer by 5 PM today”.