Embellisher

[Kit]

Someone who tends to [exaggerate] their accomplishments to impress others. There may be a [kernel] of truth in their claims -- making it difficult to call bullshit on them, not to mention the social risk involved in doing so -- but their [exaggeration] extends far beyond what might be considered remotely truthful.
More often than not, a dorky male with no real accomplishments to their name.