Apparently it's what System of a Down likes on their pizza.
From SOAD's "Chic 'n' Stu"

What a splendid pie,
Pizza-pizza pie,
Every minute, every second,
Buy, buy, buy, buy, buy,
What a splendid pie,
Pizza-pizza pie,
Every minute, every second,
Buy, buy, buy, buy, buy,

pepperoni and green peppers, mushrooms, olives, chives
pepperoni and green peppers, mushrooms, olives, chives
by viva riolu May 07, 2011
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The bouncy mushroom found in gnome forest and outside of the level
#bouncymushroomneedsrespect WE LOVE Bouncy mushroom (from pizza tower) !
by Mangoodmonkegood June 24, 2023
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a slong, johnson, one-eyed monster, the one-eyed wonder weasel and his two balls, kong, tube steak, wang, hoo-hoo dilly, bonky, rudusrod, fuck stick, frank and beans, salami, penis, male genitalia, cock, ding dong, dong, tally whacker, goober, poker, stick, rod, pole, skin flute, sly trombone, meat, gun, hose, winky, wanker, meat sword,
a purple headed mushroom cap meat sword, slong, johnson, one-eyed monster, the one-eyed wonder weasel and his two balls, kong, tube steak, wang, hoo-hoo dilly, bonky, rudusrod, fuck stick, frank and beans, salami, penis, male genitalia, cock, ding dong, dong, tally whacker, goober, poker, stick, rod, pole, skin flute, sly trombone, meat, gun, hose, winky, wanker, meat sword,
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Mushroom queen

A woman who appears to have a familiar relationship with the heads of penises, the penis resembling a mushroom
You know Diane? She’s been with 4 guys this week, she’s the mushroom queen
by Sir Francis Argaf June 09, 2022
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Punchin Mushrooms

When two guys with small uncircumcised penisbump the head of their penis’ together
by Sergeant Sassy Legs July 06, 2021
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Mushroom Flute

Act of fellatio to relieve one's penial secretions while humming a song
Chandra really knows how to blow the mushroom flute

"I'm bat-winging bad, time to get a mushroom flute"
by Pan face April 25, 2022
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mushroom wacker

when a man takes his penis and hits a woman upside the face with it.
If hes bein a bitch, use your mushroom wacker!!
by kackackackac December 13, 2009
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