a Gassia is most likely a blonde, obviously. HATES taking compliments, is usually sad for no reason, is EXTREMELY funny, and tells great stories. Gassia's are usually very gullible, and will believe anything you tell them, so take full advantage of this trait, but besides that they're great friends, and amazing individuals.
Mireille: Woah, did you see that Gassia?
Angela: Yea, she's so cool!
Mireille: I know! I wish I was as cool as the Gassia.
(noun) The opposite of gaslighting. Gasdimming involves helping someone to realise that they are perfectly sane, lucid and are worthy of love and affection; particularly if they have recently been the victim of a gaslighter.
I'm so happy that Susannah's new boyfriend is gasdimming her, not like the last dickhead she went out with.