whataloser is a way of describing someone who is acting retarded and or stupid
it is one word to exemplify the flowingness of the expression "what a loser"
although one may think that you could just as easily say "what a loser," whataloser is more exaggerated and powerful
commenting on a facebook profile picture
Jane - omg whataloser that's such a stupid picture of you tara
Tara - you know what you know what? you know what kid? i don' t care