Cover-up and Fast one

Cover-up noun - Something that covers or conceals like a piece of cloth.

Fast one and cover-up are semantically related In some cases you can use "Fast one" instead a noun phrase "Cover-up".

Fast one noun - A cunning or deceitful action or device.

Cover-up and fast one are semantically related in trick topic. Sometimes you can use "Cover-up" instead a noun phrase "Fast one".