A gewbie is a man that typically enjoys preying on young girls. So basically a gewbie is a pedophile but specifically the type of pedophile that has little to no self respect and can be found to be a fat tub of lard that cannot get women their own age.
They enjoy speaking to innocent girls electronically and is very defensive about it, they will have a temper tantrum. A gewbie is a creature of denial and will do no matter what to hide their pedophilia. A gewbie is mentally unstable and when angered will most likely binge on sweet treats.
A gewbie also most likely lives in their mother's basement and has no life outside of the confines of their mother's home.
Person 1: That gewbie that lives next door to me has been seen driving near schools.
Person 2: "Good lord somebody needs to report him to the cops"
A little scrawny ass white dude, usually with black hair about 90% of the time, that's always begging people for random junk. There's usually a gewboy in just about every group of friends, and everyone wants to go up to him and say "Get your own damnnn cotton swabs Chaaaarles!" The G is used instead of the J because the term "Jewboy" is offensive to actual Jews.
"You're startin to pisss me off Gewboy begging me for some damnWheat Thins"