There are breast physics now in Fortnite, but there shouldn’t be. At least that’s according to Epic Games who plan on patching out the unintended jiggle players discovered in the latest season six update. Epic went as far as to say that the bug is “unintended, embarrassing, and it was careless for us to let this ship.
Source: N4G PC Epic to Remove "Embarrassing" Boob Physics from Fortnite, Says It's a Bug