It is never too late to bring back the good old memories of the just recently culminated World Cup. As a British supporter of the team that took part in the latest World Cup, you may still refresh the memories of your friends and colleagues on how glorious it was to have your nation be represented. Therefore it is imperative that you always relate the British Union Jack design in your actions, possessions, and influence.
Falling short of actually just having to buy the Union Jack flag itself and posting it in front of your porch, you may give a little subtlety and finesse in trying to tell everyone just how cool and awesome your partial obsession is. While you may want to rub it on their faces, getting a little smooth and stylish is always a better idea for them to get the message positively.
For instance, you may want to wear a bowtie which is the exact image of the intercrossing lines of the Union Jack flag. Worn atop a clean white top with matching shining black shoes, it would definitely be a blast among your friends. It is little and subtle but packs a shouting presence because of its uniqueness and contrast.
If you have a girl friend with you, it would be doubly awesome to have her wear the same motif for the Union Jack. Make her mini skirt be in British pattern form. You may look like a couple of pop stars with your simplicity with a bang. World cup fever is never an issue when your sporting attires are influenced by the patterns of the Union Jack flag.