(informal, intransitive) To do random unplanned work or spend time idly / (informal, intransitive) To attempt to do something with a piece of equipment without understanding how it works.

A turn of 180 degrees, typically in a military formation. / Total reversal of opinion or attitude.

(intransitive) To turn 180 degrees, typically in a military formation.

(nautical) to brace the ship's yards on the opposite tack when going about

Alternative form of arse around / (obsolete, slang) To turn round.

(slang) The wrong way round; exactly opposite to that which is desirable; contrary; conceptually inverted; wrong.

(nautical) Used by the helm announcing to the crew that (s)he is ready to change tack.

To initiate or begin some action. / To attack.

to distribute or circulate something / to spread a rumour / (obsolete) to encompass or surround something

(military) Alternative form of about-face