a frunker is one who acts like a person who is drunk, but is obviously faking it. This person can most often times be heard saying stuff like: "dude, i'm soo wasted right now, i'm so drunk man!" or "WHOA, this booze effed me up good." The person might also use their frunkiness as a way to hit on girls who are actually drunk.
by Mark_ McCreight December 3, 2004