Car boot sale cartoon. One car is selling boots. Another car is selling shoes (using a sign reading “Car shoe sale”)
Cartoon showing a car boot sale, with a vendor selling shoes under a sign that reads “Car shoe sale”
A note to non-British readers – a car boot is the UK equivalent of a car’s trunk in the USA.
The joke here is that a car boot sale is a sale of bric-a-brac and other goods that can be carried in the boot of a car, and has nothing to do with the garment variety of boot.