Manshroom 

Another word for an uncircumcised penis

That manshroom seriously smells like tuna casserole.

Manshroom by WhoWhatWW July 19, 2011

Mushroom 

Typically a British slang term for the glans, or 'head'of the penis. Due to it's general appearance and size/shape.

See also bellend, tip, cockhead, dickhead, little head, purple head etc.

Oi lads! Look at my foreskin hanging over the top of my mushroom!

Mushroom by Llewelyn Dowd August 28, 2022

Mushroom Syndrome 

(n) - A syndrome where you're fed bullshit and kept in the dark. Derives from the method of cultivating mushrooms: they add a lot of fertiliser and keep them in the dark and damp.

A person can suffer from Mushroom Syndrome in any way; the only circumstances are:

(1) A person doesn't tell you everything about a certain situation concerning you/and or them

and;

(2) They tell lies.

Sarah: So how's your relationship with Andy going?

Bree: OMG! He gave me Mushroom Syndrome! It turns out he was actually gay, which he never told me about.

Sarah: Wow! So what did he bullshit to you about? You know, the other half of the Mushroom Syndrome?

Bree: Oh, he told me he didn't break the blender but it *actually* was him!

Mushroom Syndrome by Mushroomizer7 June 8, 2011

Growing mushrooms 

Used mostly in anime and manga, the term growing mushrooms refers to when a character has become immensely depressed or saddened. The character is often shown to literally grow mushrooms on their body, signifying that their soul is, for the time being, in a dark and dank place. (Mostly occurs with more dramatic and over the top characters who can't stop crying every 2 seconds 😒)

Senpai: (crying because the girl of his dreams thinks he's dramatic and egocentric)
Girl: "Senpai, quit growing mushrooms around me; the smell is absolutely noxious!"

Growing mushrooms by zoy70 June 3, 2018

Mushroom dick 

A smaller then average penis (but not freakishly small) with a large mushroom or toadstool shaped head.

Donald J Trump has a mushroom dick!

Mushroom dick by Dagwood55 September 18, 2018

Mushroom baton

The use of one's penis as a striking weapon. Most likely while erect. Will make a thud noise upon contact with one's forehead, cheek, or chin.

Don't make me smack you with the mushroom baton.

Mushroom baton by M_Dubz152 June 5, 2023

Mushroom baton

The use of one's penis as a striking weapon. Preferable method is while it is erect. This will make a nice thud noise upon contact with one's face, forehead, cheek, chin, or nose.

The chicken head used too much teeth during oral so I smacked her with the mushroom baton. Left a nice welt on her cheek too.

Mushroom baton by M_Dubz152 June 5, 2023