This phrase is used by people who want time to move quickly, so they may move on with their lives, ala prison release, military discharge, school graduation...
The inmate said "3 weeks until I flatten this time, so Hurry Sundown!"
Sundowning is a term used to describe a decline in cognitive abilities toward the late afternoon or evening. It is a common pattern in senile dementia.
PoorGrandma tends towards sundowning around dusk; she's fairly alert in the morning but gets more confused in the evening.
Speaking in a non-senselanguage (shandooli) when recording someone in public. The purpose is to give the person being recorded the impression that you do not speak English.
Recording person: Harakata takiti katakata, shandoolie!
Person being recorded: What?
Mysterious Vtuber British girl (alleged not crab girl) that lures unsuspecting people to her house in rural England. She subject her victims to a combination of high pitched screeches, soothing voices and random trivia.
Refuses to be called "Shnidoo".
Man, that Shondo girl sure is a cutey pie. I want to hug her and give her all my money!