An oratory elaboration which exceeds the limits of what most people would describe as useful or informative, or which tangentially strays into the realm philosophical musings.
"Yo, your homie said you was in for some shenanigans."
Flourish means to increase, thrive and to grow luxuriantly. It can also mean to prosper or achieve high success in every area of life. To Flourish is to reach the highest level of growth and influence. Flourish means to shine and glow as well.
The action of swirling one's cape in dramatic fashion right before an announced exit, but doesn't necessarily require the actual presence of a cape to achieve the intended effect (see awkward arm swing but followed with an exit stage left and dramatic music). Usually preceded by a declaration of intent, ("Come dobby, we're leaving") and followed by an evil laugh.
Usually reserved for villains, but can also refer to would-be heroes who just want to look cool. The real utility of a cape, because let's face it, capes do nothing except make you look cool. Often results in the opposite effect.