A threat for surprise retribution at a later date for an earlier transgression that usually results in the instigator missing teeth. Similar threats include "watch your back" or "you'll get yours". The notion of the saying is that retribution will happen suddenly when the instigator least expects it, such as sleeping and their teeth are placed under their pillow. The saying is otherwise used broadly to mean any level of revenge.
Someone does another person wrong or victimizes them, the victim may say "Watch yourself! You're gonna get a visit from the tooth fairy!"
Or used to dispel concern by others that retribution is going to be made "They're gonna see the tooth fairy, don't worry about it."
The act of defecating into the pillow sheet of another person, due to extreme aggression, hostility, rage, or an attempt at a very funny practical joke.
Ryansnuck into Tyler's room and gave him the dirty tooth fairy.
A Shackteau is a humble, weather-beaten, structurally questionable shelter located in a spectacular or highly coveted place—Wales, Jackson Hole, Sun Valley, Crested Butte, coastal Maine, the Alps—where the building itself may be worth almost nothing, but the dirt, view, access, and mythology make it absurdly valuable.
In use:
Shackteâu - We thought it was an abandoned shed until the realtor called it a rare alpine Shackteâu with unobstructed views and listed it for $2 million.