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.
Ryan snuck into Tyler's room and gave him the dirty tooth fairy.
The grindset is a contemporary ideology of self-exploitation disguised as strength, deeply tied to the aesthetics of the “sigma male” and to new digital forms of patriarchy. It promotes the idea that human worth depends on productivity, economic success, absolute emotional control, and the ability to work endlessly, turning vulnerability, rest, community, and tenderness into signs of weakness. Beneath its rhetoric of discipline and power often lies a profound inability to relate healthily to pain, fragility, and human interdependence.
“That’s the grindset, brother. While weak men sleep and complain, sigma males stay disciplined, work in silence, suppress emotions, and build power while everyone else wastes time chasing comfort.”