The term has expanded far beyond the stage and is now a common piece of modern slang.
When a friend backs you up in a conversation, helps you tell a good story, or supports your idea in a meeting, you can jokingly call them your `捧哏`. It's a lighthearted way to acknowledge their help.
This is a very common and often critical usage. If a subordinate constantly agrees with their boss, lavishing them with praise regardless of the merit of their ideas, they are said to be “playing the `捧哏` role” (`当捧哏`). It implies insincere flattery for personal gain.
You can use it as a verb to ask someone to play along or back you up. For example, before telling an exaggerated story to a group of friends, you might whisper to one of them, “待会儿给我捧哏” (Dāihuìr gěi wǒ pěng gén) - “Back me up in a bit.”