What happeneds if slippage is 100%

Don't make fun of me guys i just learned about crypto recently so I'm not much familiar with it, I'm receiving a at least 1000 Dollar airdrop but I don't know how to sell it in the first minutes of its listing, should i put the slippage very high? Price of the token would definitely dump but I Don't know how much so it would be great if i can sell it as fast as i can