Best definition
whataloser is a way of describing someone who is acting retarded and or stupidit 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