1968, U.S. college student slang, probably a variant of feeb "feeble person."
An even lower form of life than the spod, found in much the same habitat as the former. though more prevailent on talker systems. Unlike spods, upon receiving the desired response to the question "Are you male or female?", dweebs will then engage upon a detailed description of themselves and how wonderful they are, often in the hopes of truly impressing the other with their "charm" and "wit". Nearly all dweebs are male, but very few actually live up to the image that they present. Dweebs, unfortunately, are often the cause of ill-will, and may well bring a bad reputation to the system in question. They are often, however, easy to wind up and can be the source of great mirth to the seasoned user.