Flipped is an Eternity Mode-exclusive debuff inflicted by certain enemies and is passively inflicted whilst in the Underground Hallow. It inverts the player's gravity.
The player can become immune to Flipped by equipping the Galactic Globe or its upgrades. Additionally, the effect of Gravitation Potion prevents Flipped from forcing the player upside down.
The player can become immune to Flipped from Underground Hallow by equipping the Gelic Wings and Pure Heart, do note that it doesn't make the player immune from Flipped that inflicted by enemies