A GPS beacon in a TOOTH implant.
Money Heist Season 3, Episode 7
Jaime smashed the river lords
at the Golden Tooth,
Game of Thrones Season 1, Episode 8
You have a sweet TOOTH, haven’t you?
Money Heist Season 1, Episode 13
Your mother always had a sweet TOOTH.
Game of Thrones Season 4, Episode 5
Sure, he's a bit long in the TOOTH,
a bit withered, been in the sun too long.
Game of Thrones Season 5, Episode 6