Frankenbiker
A crusty, hipster-punk who rides a double-decker bicycle.
Dude: Dude! That guy was on a really tall bike! And now it kinda smells bad.
Other Dude: Frankenbiker!
Other Dude: Frankenbiker!
Frankenbike
A bike built up from various components scrounged from different sources (friends, swap meets, craigslist, etc.).
Elmo didn't have the money for a new bike, but he managed to assemble a Frankenbike from stuff he had lying around the garage and a few parts he picked up cheap from craigslist.