Someone that talks, tweets, and acts poorly in a blog. A bloghole follows another blog just to get a "follow back;" then unfollows immediately after the pay out (happens often on Twitter). A bloghole blogs with the intention of becoming popular or "making it big" (do we know anyone that has happened to?). A bloghole comments just to get you to follow them.
"You just blog about your tawdry affairs to get attention ... you are such a bloghole!"
"'Great post. Follow me back @.....' - said by every bloghole known to mankind."