That David Mitchell one states some pretty obvious ones, but I'd like to include "I ain't never". Technically, it suggests you have as implied by the usage of a double negative. Young people seem to say this a lot, knock it off.
Edit: Oh, and the "you know" segues (loosely termed) are a nuisance. If someone is explaining something and every other word is bridged with "you know" I feel like throttling them shouting "NO I DON'T KNOW!"
Edit: Oh, and the "you know" segues (loosely termed) are a nuisance. If someone is explaining something and every other word is bridged with "you know" I feel like throttling them shouting "NO I DON'T KNOW!"