How to be Insulting at Christmas: Refuse to give any guests a drink, on the grounds that it's for their own good not to drink and drive. Have plenty of soft drinks to offer them though. Then pour yourself a large Scotch, on the grounds that you aren't going anywhere and don't have to worry.
How to be Insulting in the Street: Approach a complete stranger as if you are about to welcome them warmly, but instead walk straight past and disappear into a shop.
Fun fact: If you cut off all your body hair and laid it end to end you'd be a fucking weirdo.
How to be Insulting in the Street: Find a bus stop with a waste bin attached to it. Hide a small bottle of champagne and a leg of chicken in the bottom. Wait for a queue to form at the bus stop, then go and rummage in the gutter, and finally look in the bin. Find the things you've hidden, and devour them in front of the people waiting for the bus.
How to be Insulting in the Street: Wave frantically across the street to people who are trying to ignore you and try to attract as much attention to them as you can.