(intransitive, informal, UK) To make an attempt; to try. / (intransitive, informal, idiomatic, UK) To attack (physically).

(UK) daring, courageous, particularly in the face of unexpected adversity.

(idiomatic, chiefly African-American Vernacular) To be attractive or socially successful or have an aura of success. / Used other than figuratively or idiomatically: see have, go on.

present participle of have it going on

(Britain, informal) An ordinary member of the public who intervenes, often at personal risk, to stop a troublemaker, hooligan or ne'er-do-well in the act of committing a crime.

plural of have-a-go hero

Used other than figuratively or idiomatically: See have, go. / (colloquial) To temporarily convince someone of a falsehood. / (colloquial) To cause someone to be excited, aroused, or upset.

To have many advantages.

(informal) To be romantically or sexually involved with someone.