To do something to an exceedingly excellent capacity. Most notably used in reference to dancing, modeling, sexual prowess and/or other physical performance that requires a large amount of fiery attitude, vitality and vigor.
A term derived from the words "work" and "twerk" but now used exclusively in the above areas.
"Bitch, you better werk!"
"Boy, go on with ya bad self. Werk it out!"
"I'm about to go in this class and put in werk on this routine."