Python UK /ˈpaɪθən/US /ˈpaɪθɑn/noun 1forms 1phrases 1 noun1 •(informal) Any member of the comedy troupe Monty Python: Graham Chapman, John Cleese, Terry Gilliam, Eric Idle, Terry Jones or Michael Palin.John Cleese is perhaps the best-known of the Pythons. formsPythons Phrases with Python drain the pythonTo urinate.