Verb: to annoy or irritate, but extra.
Some of my customers firk me so much. My computer is just firking with me now.
sandals in the style of birkenstocks bought from another, typically less expensive, brand; a blend of the words "fake" and "birks"
yo why would you speend $100 on birkenstocks when you could've gotten the target firks for a quarter of the price?