To flex the biceps muscles in the upper arm as a show of muscular strength or development

(idiomatic) To leave or depart, especially hurriedly; to go away.

(idiomatic) To succeed in (something); especially, to succeed in making a living.

(intransitive, dated) To hurry or hasten.

(colloquial) To complain; to demand attention or remedy for a problem.

(idiomatic) To regard without due seriousness; to joke about.

(idiomatic, childish) To pretend or imagine.

The act of pretending that what is imaginary is real.

imaginary; conjured in someone's imagination, especially when imagined by a child

(idiomatic, informal) To succeed at something or meet a requirement; to be chosen out of a field of candidates or possibilities.