Usually refers to "Save the Best For Last", a teachable
killer perk belonging to The Shape / Michael Myers in Dead by Daylight. (The Halloween Chapter DLC)
This perk selects one of the four survivors as your "Obsession", and gives you
small Successful Attack Recovery Speed increase (5%) for every survivor other than the Obsession that you hit, up to 8 stacks (40%). Often
seen on basic attack killers (commonly referred to as "M1 killers") to impressive results.
"I really
like running Sloppy Butcher for the healing speed debuff, but STBFL looks tempting too."
"Out of all of The Shape's perks, I think I prefer STBFL to Dying
Light."