turn sour, mope, look sour
moped, motorized bicycle, motor bike
Он мо́жет взять мой мопе́д на не́сколько дней.
He can borrow my moped for a few days.
Я люблю́ мопе́ды и мотоци́клы.
I like mopeds and motorcycles.
Не кисни, скоро поедем на море!
Don't mope—soon we'll be going to the seaside!