He's nobbut a chip 'oiler.
I suppose it's really Yorkshire dialect, but it refers to a cyclist who is 'Nothing but a person who is only capable of riding his bike to the fish and chip shop', ie not a proper cyclist.
Chip 'oil had nothing to do with what the chips were fried in - that was usually animal fat, but in dialect, any place where work was done, was a 'hole' or 'oil' in dialect. My Dad, a foreman spinner for instance, ran the 'spinning 'oil'.
Have we had 'living ovver't (over the) brush' for living in sin yet?
You've all brought back memories of how our Mums tried to keep us little virgins till marriage. All most parents achieved, was to successfully teach us how to be devious!!
One lass of my acquaintance managed the virginity thing - and ended up celibate for 11 years until she finally broke down and sought help - her husband was impotent. The anti-sex brainwashing had been so intense, that she probably felt she would look bad for complaining she wasn't getting any.
Which brings us to another saying - 'never buy a pig in a poke' ie check the goods before you commit. That poor lass should have!