When you eat spoiled mayonnaise and get food poisoning, commonly referred to as mayonnaids.

A Combination of the Words Mayonnaise and Aids. Not to be confused with mayonaids.

Symptoms and/or side effects of mayonnaids may include (but are not limited to): constant vomiting, projectile diarrhea, projectile vomiting, nausea, headache, bloating, bad gas, fever, bad breath (unrelated to vomiting), vertigo, weak muscles, fear of mayonnaise, general gastrointestinal dysfunction, shivering and/or sweating profusely, uncontrollable flatulence. In some cases, mayonnaids can be confused with the flu, and victims of mayonnaids may develop a watered-down version of the swine flu swagger.
"Dude, I had some subway last night and I think the mayo was rancid, 'cause this morning when I woke up I had a terrible case of mayonnaids; I must've puked my guts out a dozen times at least, and that was before I managed to reach the bathroom.
by friggsy August 21, 2019
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Semen containing the HIV virus.
About 1 week into her backpacking trip through Rwanda, Shelley got sprayed with mayonnaids from a vagrant in the street who had been pole pumping behind a bush.
by Zonal K September 26, 2019
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An emulsification of egg white, lemon juice, water, and sugar, meant to be served as a refreshing summer beverage or on a sandwich as a spread.
"It's so hot out, I could really go for a glass of mayonnaid," said Sid.
"Same," replied Dave, "and I'd love some on my salami sandwich, too."
by the gourmand October 16, 2022
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