One who does things for no apparent reason, without understanding their situation.
A formal greeting among friends
Someone who has what we call "
Sugar tourettes", on a sugar high and says things at
random
Friend -Hey
jeff i heard you were planning on studying later with jamey right?
Jeff- GAK!
Hey jeff whats up? GAK!
Hey jamesy poo, i got you a valentines day present. GAK! SHAMAGALA