I'd like to suggest two possible variants:
1. A loud "Oh, I say!" with a slightly sneering and patrician tone. Keeping the image of Terry-Thomas in one's mind can help with getting this right.
2. Shout the following at the top of your voice, with added profanities: "Get off the road! You don't even pay Road Tax!"
The first will cheer you up, allowing you to enjoy the rest of your ride and arrive refreshed and happy at your destination.
The second is true and also a sound piece of advice. If these so-called 'cyclists' had to pay anything or pass any tests before being let loose on the Queen's Highway, they might show a little more respect for the Law and for their fellow road user. One doesn't like to generalise, but they are all as bad as each other. Some are worse. This is a fact.
They all cross signals at red all the time and none of them ever seems to wear a helmet, make any effort to be visible or show any respect for other traffic. Were it not for my presence, they would be their own worst enemies.
Even the sporty ones are so doped up on EPO or crack cocaine that any so-called victory was won in the laboratory rather than on the road.
Cyclists? Schmyclists!
I hope I have helped, but fear I have not.