Graby is the colloquial term for a man's semen, or more commonly known as BabyGravy.

To do so much coke off of Antoni Porowski's dick that you get a severe nose bleed...

Letuion is a form of erotic roleplay performed by Fumo ERPers using Touhou characters, usually depicting Lesbian
Sex.

Leetspeak (13375p34|<) for the 3-letter word for "donkey" or your rear end in your nether region.

A creampie by Pai

A Watermelon Sugar High is what state of mind you begin to experience precisely after you consume at least one can of Mountain Dew: Major Melon soda pop while simultaneously listening to the corresponding song by Harry Styles. It is yet a mystery if there are any other steps involved in activating this state of consciousness, but I am sure enlightenment of the exact formula will be revealed and most likely even monetized in the very near future if it isn't already clear.