The story
From 1968 US college slang, probably related to feeb. The 1980s backronym Dim-Witted Eastern-Educated Boor derives from apparent social and attitudinal differences between West Coast and East Coast US, and describes a stereotypical Ivy League graduate from Harvard, Yale, etc.
First known use, by meaning
- from 1968 A boring, studious, or socially inept person.
Etymology from Wiktionary, CC BY-SA 4.0.