Depends on what you mean by bluff.
Eg you can pretend that you have another offer. But if someone calls your bluff, you shouldn't come back begging. If you need to, don't bluff.
Eg you can pretend that you have another offer. But if someone calls your bluff, you shouldn't come back begging. If you need to, don't bluff.
There's nothing backing up the bluff, apart from your willingness to walk away.