Derived from gwan lee and han dick. This word combines the "catch people on their shit" and "to blame others", making this word a word to use when you are trying to make your point but some stupid people would just argue against you without logic. Therefore, you say gwan dick to negate these people.
Chill dude: "All I'm trying to say is, what you are trying to say doesn't make sense because-"
Annoying dude: "LALALALALALA"
Chill dude: "gwan dick"
Annoying dude: *gone*
*"ohhhh" in the background"