Definition
An "egghead" is a derogatory term for an intellectual or someone who is perceived as overly academic or bookish. It suggests that the person is intelligent but out of touch with the real world or common sense. Think of it as a playful insult for someone who's 'too smart'. The term implies a focus on intellectual pursuits at the expense of practicality. It's like calling someone a 'nerd' with a condescending tone.