mushroom rigged 

to be endowed with a huge bellend but no shaft

oh my god jeff! youre mushroom rigged!

mushroom rigged by Neo December 25, 2003

mushroom slap

To slap someone across the face with one's penis.

Those dudes are always mushroom slapping each other.

mushroom slap by Nate Fergus February 2, 2003

mushroom tatoo 

when you smack your dick across someones face and it leaves a mark.

"I slapped that bitch with my dick and gave her a mushroom tatoo"

mushroom tatoo by Peniswillow April 8, 2003

mushroom management 

To keep your employees in the dark, and every now and then throw shit on them.

mushroom management by farks_me September 18, 2003

Mushroom Tip Sauce 

Semen. The penis has a mushroom look to it; the sauce in this context is the semen that is ejeculated

That bitch was giving me head and when I came, she swallowed my mushroom tip sauce.

Mushroom Tip Sauce by ESA-Man June 29, 2009

mushroom pudding 

Psychedelic dessert dish that contains hallucinogenic shrooms. While considered haute cuisine, you won't find this served at the finer establishments. British street youths who are done with getting buzzed on a budget will sometimes resort to making mushroom pudding to get a more chic and elegant tripping experience.

also referred to as: cubensis custard

Joris: yo wanna get messed up tonite?
Agathia: yea but it's my birfday innit? gotta keep it proper classy bruv, how about some bloody mushroom pudding?
Marion: What the fuck is mushroom pudding?

mushroom pudding by The Barnacel May 26, 2020

Mushroom top 

Male masturnation technique wherein the man vigorously oscillates the palm of his hand solely on the tip of the penis. A pleasureful experience if done masterfully, and vice versa

Ed realized the tip of his dick is pretty sensitive, so he decided to polish the bishop mushroom top style this afternoon.

Mushroom top by Dang Lin Wang LXIX April 23, 2015