'Sperg' is both a verb and a noun. It's almost always used for Internet purposes, and to sum up, it pretty much means a person with Aspeger's (or perceived to have it) that gets so dramatically passionate about a subject to the point where it's greatly aggravating to everyone else.
Some people find it offensive, others think it's the perfect term to describe their Asperger's. It'll all a matter of preference.
Dude, are you seriously going to point out every last difference/downgrade with the newer Transformers cartoon? Man, you're such a sperg!
Don't even mention Optimus Prime to Robert; he'll sperg out and will drone on about the history of his design for three hours.
Someone who is opposed to PDA, nudity and the like, as well as having many old-fashioned ideas and views and dressing up in Victorian style clothes.
Named after a character in The Sims franchise with the same mannerisms.
Mrs. Crumplebottom totally interrupted our date and hit me with her purse!