It's one of many quintessential British responses.
If someone just complains about something and expects that others will resolve the complaint we would suggest they see a doctor and get something to help them grow some balls so they would be man enough to deal with it themselves.
If someone is consistently stupid we would call them a Muppet, because the only plausible reason for their stupid behavior is that someone else has a hand up their back and is working the controls.
And Quincy, if you want some good British comedy look up Black Adder, Red Dwarf and the best one ever, Upstart Crow.