Haven't posted on this hread before so I have a few.
When you're walking behind a very slow person and they don't have the fucking manners to let you passed them despite knowing that you're obviously in a hurry/wanting to walk faster than a fucking snail.
When you see someone at the other side of a door as you approach it, so you open it for them and step aside to let them through. After having the manners and patience to let them through, another fucking 25 people come crawling through, and not one of them has the common sense to see that you've been standing there like a spesh for ages.
When you're talking to someone and someone else feels the need to say your name 12 times before you politely tell them to f**k off and then take offence.
The OF, they're both petty and they both get on my nerves.