Just launched! Learn slang while watching funny vids: urbandictionary.tv
1. gullid
The combined term to refer to someone as both "gullible" and "dumb".

Thus meaning incredibly stupid.
I'm so gullid, I believed that man who said he was out of gas and I gave him 100 bucks and drove him to his car. I just ended up losing my wallet and my car along with my money.