(2)(noun/ verb) a good friend who is betrayed by their friend for personal gain; to betray a good friend for personal gain
(3)(noun) a word short for Banquo, similar to B-Quo
B)Invader Zim always banqued on his loser robot GIR.
(2) A)My best friend is a banqu for abandoning me to be class president.
B)My best friend banqued me just to "fit in".
(3)I can't believe Macbeth killed his best friend, Banqu!