Examples:

• Maybe it's time to throw in the towel.
• Come on, we're not ready to throw in the towel here.
• Well, I'm not willing to throw in the towel yet.
• That doesn't mean I'm ready to throw in the towel.
• You're not gonna throw in the towel, not on my watch.
• If not, we'll throw in the towel tomorrow morning over breakfast.
• A man's got to know when to throw in the towel.
• There's no way of making him throw in the towel.
• No, Gus and I never know when to throw in the towel.
• You're not gonna throw in the towel, not on my watch.