To lol so hard that you can no longer breath properly. Usually followed by more lols.
Timmy: "Poop."
Bobby : "HAHAHAHAHahahahahaha.... *wheez*...hahahah..."
Timmy: "You hyperventilaughed a little too hard there."
Bobby : "I thought I was gonna die. srsly."
by Kiesman September 15, 2009
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When something is funny and scary at the same time making you hyperventilate and laugh hysterically at the same time.
I was playing Slender: The Eight Pages and was so scared that I screamed and fell out of my chair and started hyperventilaughing.
by Rukami December 5, 2012
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Verb: Hysterical fits of laughter causing a shortness of breath.

Adjective: The type of laughter caused by hallucinogens ie mushrooms, LSD.
I ate so many boomers I started to hyperventilaugh!!
by Daizykatez June 2, 2022
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