Hi there,
A nuclear bid/snipe is where you place a ridiculously high bid to ensure you win no matter what.
Like an item worth $80 tops, you bid/snipe $200 to make sure you get it.
Dangerous game if 2 nuclear bidders are after the same item
Other slang...well, I dont think there is too much.
AS = Auction Sniper and the rest is just standard net jargan I believe.