- sourpuss, picklepuss, gloomy Gus, pouter - someone with a habitually sullen or gloomy expression
--1 is a kind of unwelcome person, persona non grata
Derived forms: verb pout1, verb pout2 - pouter pigeon, pouter - one of a breed of pigeon that enlarge their crop until their breast is puffed out
--2 is a kind of pigeon