Stump

In internet slang, “stump” is a term used to describe a situation where someone is left speechless or unable to respond to a remark or question. It refers to the feeling of being unable to come up with a suitable reply, as if one’s words were cut off like a tree stump.

Examples:

1. Person A: “What’s the meaning of life?”
Person B: “Hmm… I’m not sure either. That question really stumps me.”

2. Person A: “Okay, I’ve got a riddle for you: What has keys but can’t open locks?”
Person B: “Hmm… I can’t think of anything that fits. You’ve got me stumped.”