When the siege of the British garrison in Mafikeng, South Africa ended after 217 days—signalling the end of the Boer War—on May 17, 1900 there was such jubliation in streets of London that the verb maffick was coined by journalists to describe the rollicking scene.
Use this verb to signify madcap fun and boisterious carousing.
See also: running amok, painting the town red.