Top definition
a) When an internet user excessively posts or comments on message boards, classified ad sites, or social media, often times with similar or repetitive content.

b) Exceeding a socially acceptable amount of posts, comments, or responses, even if the necessary post limit is not quantifiable.

c) Beating a subject to death online.
This guy keeps spamming the shit out Craigslist. I can't even flag half the ads, he's overposting so much.

It's Sunday. Dan is going to overpost about his shitty football team on Facebook.

Girls that change their profile pics more than they change their clothes are overposting on their page.
by Gynacologist September 04, 2013
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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