A nope is an expression used to say "no" quickly and informally. You can use it in place of saying "no thanks," "not now," or just plain old "no."
You might hear someone say "nope" when they're asked if they want another cookie, or if they want to go on a hike today. It's like saying no, but with a more casual tone. You can use it in writing too - you could text someone "do you want to meet up?" and they respond with "nope."
A negative reply, no.
Example: I'll take that as a nope, then.
