(historical) A policy of population control in China, whereby a married couple is allowed only one child.

(idiomatic) To insert a finger or other object into one's nostril to remove obstructions, especially dried mucus.

(intransitive, slang) To become stridently angry, especially from worry.

(idiomatic, vulgar) To lose one's temper. / (idiomatic, vulgar) To have a sudden burst of emotion, regardless of the type of feeling. / (idiomatic, vulgar) To break down in laughter.

(idiomatic) sharp-witted.

Of vocal sounds: very loudly; as loudly as possible.

As far as one can understand with the data and knowledge available at the moment.

To clench one's teeth together tightly because of pain, anger, frustration, or self-assurance. / (idiomatic) To face up to a difficult or disagreeable situation and deal with it.

(idiomatic) To dance.

To pull or push one's fingers so that the joints make a cracking noise.