In any video game:
When death occurs for an unknown reason.
Nobody knows how it happened.
Nobody knows why it happened.
Nobody knows WTF happened.

But, it's fucking hilarious.
Guy 1: "WTF, did Jesus just snipe me?"
Guy 2: "Bro, I have no clue you just fainted."
Guy 1: "Fucking Ninja Heart Attack, damn it."
by WolfRhino March 2, 2008
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When it is so cold that you don't want give a hand job for fear of freezing some guys dick and thus giving him a dick heart attack
"Hey did you hook up with that girl?" "Nah man it was too cold, she would have given me a dick heart attack"

"Dude its so cold out that i'm going to get a dick heart attack"
by DankVapes January 9, 2017
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An intense and often short-lived sensation of dread and fear of an adverse outcome, often immediately following an occurrence that disrupts a pattern
"Dude, that last step on those stairs gave me a mini heart attack"
"While I was sorting my photos, I had a mini heart attack when I deleted a good shot"
by Au_dragon December 17, 2017
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The intense, searing chest pains, similar to a regular heart attack, but caused by indigestion.

Also, any time someone exhibits the full symptoms of a heart attack, such as chest pains, severe gas, sweating, headache, nausea, dizziness or numbness in the arms, while not actually having a heart attack.
My mother went to the hospital Friday with chest pains. She's ok though, turned out it was just a Mexican Heart Attack.
by Wolf89 July 18, 2008
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A definite heart attack. Something that could only be described as a heart attack. When you get this feeling it is a 100% undeniable fact, you’re having a heart attack.
Jim: Franklin are you okay?
Franklin: Yes, I’m fine.
Jim: What happened?
Franklin: I had a sheer heart attack.
by JediMurderer511 May 24, 2018
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