If you say that someone has a riotous lifestyle, you mean that they frequently behave in a excessive and uncontrolled way, for example by eating or drinking too much. aristocrats who wasted their inheritances in riotous living. = wild
characterized by unrest or disorder or insubordination; "effects of the struggle will be violent and disruptive"; "riotous times"; "these troubled areas"; "the tumultuous years of his administration"; "a turbulent and unruly childhood"
You can describe someone's behaviour or an event as riotous when it is noisy and lively in a rather wild way. The dinner was often a riotous affair enlivened by superbly witty speeches. + riotously ri·ot·ous·ly a slapstick affair which I found riotously amusing
unrestrained by convention or morality; "Congreve draws a debauched aristocratic society"; "deplorably dissipated and degraded"; "riotous living"; "fast women"