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stands for "mental health day"

when you're too tired/lazy to go to work/school, so you call in sick. basically a euphemism for faking sick.
Mom: Billy, time to get up for school!
Billy: But I am le tired.
Mom: Then have a nap.
Billy: Can I take an MHD?
Mom: Fine, you lazy piece of shit.
by Blazko March 10, 2008
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2
Stacy: are you ok?
Claire: yeah it’s just my MHD getting to me
by Camie1755 March 15, 2018
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