-Chew with mouth open.
-Breathe audibly whilst eating.
-Bite, or make sound from their teeth contacting cutlery.
-Slurp any form of liquid.
-Burp and not say excuse me.
-Unnecessary swearing.
-Racist / other discriminatory comments to appear witty or funny.
-Overtly sexualised mannerisms and comments.
-Not turn off TV / consoles / computers when they finish using them.
-Walk really slowly and stop or move around so you can't pass easily.
-Ask you a question when you just put food in your mouth and you have to like do the awkward, "wait for me to finish" gestures and smiles.
-Forget what movies you've seen / forget what a song / artist is called and keep asking me heaps of times. (only my dad does this, but it's quite annoying...)
Yeah. Surprisingly, I'm not annoyed easily, I'm really patient, so I'm not going to go yelling or telling people off for doing this, but inside, I am steaming. xP