What does a one-liner mean?

What does a one-liner mean depends on context, but generally one-liner is short, concise joke, witty remark, or statement that is delivered in single line, designed to be humorous or impactful with quick punchline. In comedy, one-liner is joke that is one sentence long, like I told my wife she was drawing her eyebrows too high, she looked surprised. In business, one-liner can mean brief elevator pitch or summary of company in one sentence that explains what you do. In programming, one-liner is program or code written in single line to accomplish task. In everyday conversation, one-liner is quick witty comeback or memorable quote. In gutter cleaning context, one-liner may refer to single line description of service. So one-liner means short, concise statement or joke delivered in one line, designed to be memorable, funny, or to summarize idea quickly, with effectiveness coming from brevity and punchiness, often used in comedy, marketing, and casual conversation for quick humor or clear message.