Not on Monday, Tuesday, Wednesday, Friday, Saturday
Sunday but on Thursday, make sure you are thirsty

from The Weeknd – Thursday Lyrics on Rap Genius

Meaning

“Thirsty” is a metaphor for a mental craving over Weeknd, not so much a physical beverage. She better build up suspense over the whole week for that one day with him

Also a pun on “Thirsty Thursdays”, used by college kids since Thursday nights have the rowdiest parties

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