Gargling or drinking Peppermint Schnapps when no actual toothbrush is available for use, usually because a person has spent the evening in one or more strangers' beds.
Chloe begins every morning by using a hooker's toothbrush so that her mouth doesn't smell like jizz after she's been slutting it up all evening.
The amount of space occupied by a dead hooker, typically used to measure the size of a car's trunk. The actual volume of a Dead Hooker Unit has been disputed, since hookers come in different sizes. Most parties agree that a DHU is the average volume occupied by a dead hooker, but that there is not a definite conversion from DHU to liters.