Yesterday DP and I were sat in the car, on the driveway waiting to leave. The dustbin cart pulled up in front of the house and the men busied themselves emptying the bins down our street. So DP took the opportunity to sit playing with the sat nav.
Then he looked up and said "I bet they leave the bin right in the middle of the driveway blocking us in, if they do, I'll kick off".
I ignored this. Then the bin man pushed the bin in front of the house and walked off (in front of the car but TBF, I don't think he realised anyone was IN the car). Anyway DP bibbed the horn, the bin man looked across, realised his error and walked back over to the bin to move it. DP then shouted "yeah thats right, right in the middle of the fucking drive way, you can see I was waiting to get out, fucking tosser" He then revved the engine and shot the car forward towards the bin man (but stopped it again before it caused the poor bloke any real concern) 
I was so embarrassed and couldn't even look the binman in the eyes.
Its not the first time he's done something similar but it really, really embarrassed me. He's also got a habit of speeding up if someone crosses the road in front of him. For instance a group of teenagers walked out into the road, acted a bit cocky like they do, refusing to rush etc and DP actually speeded up the car and missed them by inches. One day he WILL hit someone, I'm sure of it. He also speeds up towards cars that pull in front of him too.
Ok I know I'm not being unreasonable to be against his behaviour but he acts like I'm having a go at him if I say anything and says I'm trying to cause arguments.
One time we were driving along and a young kid came flying across the road on a bike, barely looked for cars but he was only about 11. Anyway DP shouted "look at that fucking dickhead" - then the bike's front wheel got stuck in a grate and the kid went flying over the handlebars, headfirst onto the concrete, smacked his face on the pavement and blatently broke his arm. He was crying out in agony, everyone who saw it went running over to help, I was mortified and wanted to see if he was ok - DP shouted "HA HA! nice one! serves him right, that does"