Keep a straight face
Meaning: not to laugh, to manage to stop yourself from smiling or laughing
Example: I can never play jokes on people because I can't keep a straight face. I tried to keep a straight face, but failed.
Выучи грамотный разговорный английский до уверенного владения всего за 9 месяцев по системе естественного усвоения иностранных языков. Жми!
Example: I can never play jokes on people because I can't keep a straight face. I tried to keep a straight face, but failed.