Today on the bus, a driver came over the radio asking:
"Does anyone know why Marion Road is chockers today?"
Chockers is the cute-ification of chock-a-block, which we all know from Colin's backpack in "Love, Actually" means "packed full." In other words, Marion Road was "packed full" of cars (or perhaps condoms, hard to say).
Chockers is supposedly used in the UK as well as Australia, and according to The Almighty Internets was naval slang from the WWII era.