What is the meaning of this sentence : It's last_minute bad faith bul*****.
Harvey: Well, Gerald, I specialize in troubled situations, and when I left here at 7:00 P.M., this deal wasn't in jeopardy, so I'm just trying to figure out what happened in the interim.
Gerald :We keep offering more money. They keep rejecting it. It's last-minute bad faith bullshit.

Can you explain what that means? Thanks in advance.

Question

What is the meaning of this sentence : It's last_minute bad faith bul*****.
Harvey: Well, Gerald, I specialize in troubled situations, and when I left here at 7:00 P.M., this deal wasn't in jeopardy, so I'm just trying to figure out what happened in the interim.
 Gerald :We keep offering more money. They keep rejecting it. It's last-minute bad faith bullshit.

Can you explain what that means? Thanks in advance.

Answer

Gerald is suggesting that the business client that Harvey was negotiating with is now using somewhat dishonest methods to get more money from the deal than they actually deserve.