expression, godan verb (-ru)
be on the verge of tears; look ready to cry
Describes a facial expression or state where someone, especially a child, is about to cry. Often used with ～そうな顔 or similar phrases.
See also: べそをかく
叱られた子供はべそを作って立っていた。
The scolded child stood there on the verge of tears.
彼女はべそを作りながら、もう一度お願いした。
She asked once more, looking ready to cry.