it means Holy Shit Fuck Me Up
You're watching an instagram video of someone making a grilled cheese sandwich, when the money shot comes up and they pull the two halves away from eachother and that gooey, stringy bit looks so damn sexy you send it to your best friend/roommate with the message "hsfmu"
by Tikicowboi September 5, 2019
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by Noor2025 June 1, 2020
Get the HSMTS mug.Abbreviation for "Holy Shit, That's Karen as Fuck." Often used to express surprise and admiration when Karen gets close to out-Karening herself. Pronounced "hist-calf."
A: "Yo, did you hear what Karen did at Target? She tore down a whole display of facemasks and then when the cops showed up at her house she claimed to be the spokesperson for QAnon."
B: "HSTKAF."
B: "HSTKAF."
by Dayou Balimi July 5, 2020
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