To hijack someones methodical attempts to fix something by throwing a series of guesses at the problem, eventually stumbling across the right solution.
While trying to work out why I can't browse the web from one of my PC's, an over-zealous colleague says:
"Have you looked at the proxy setting, I bet it's that! What about your IP address, have you got an IP address? Have you tried upgrading to the latest browser??. It's the proxy setting isn't it!?"
My response: "STFU and stop tryjacking me"