mushroom cloud

A mushroom cloud is a distinctive fiery mushroom-shaped cloud of condensed water vapor or debris resulting from a very large explosion. They are most commonly associated with nuclear explosions, but any sufficiently large blast will produce the same sort of effect. They can be caused by powerful non-nuclear weapons like the GBU-43/B Massive Ordnance Air Blast bomb. Volcano eruptions and impact events can produce natural mushroom clouds.

Mushroom clouds are formed by many sorts of large explosions under earth gravity, near the ground. Mushroom clouds form as a result of the sudden formation of a large mass of hot, low-density gases near the ground creating a Rayleigh-Taylor instability. The mass of gas rises rapidly, drawing up a column of additional smoke and debris in the center to form its "stem". The mass of gas eventually reaches an altitude where it is no longer of lower density than the surrounding air and disperses, forming the "head".

Nuclear mushroom clouds are often also accompanied by short-lived vapor rings around the stem, called "Wilson clouds". These are created by the blast wave causing a sudden drop in the surrounding air temperatures, causing water vapor in the air to condense around the explosion cloud's "stem".

Mushroom clouds cannot form after an explosion high in the air, under water, or in space. In space the explosion would be somewhat spherical.

goddammit people a mushroom cloud is a physical phenomenon not a sexual move

by Young Reezie December 13, 2009

mushroom tattoo

a mushroom tattoo is when one of the male sex whips out his extremely large penis and whips u any where on the facial region. if enough force is applied a red bruise from the tip of the penis will appear on the face in the shape of a mushroom..hence the name mushroom tattoo.

nick: yea bitch like my dick...LICK IT.

nick: damn bitch i said lick dont bite.

(WHACK)

GIRL:damn baby you just gave me a mushroom tattoo.

by nigga nick March 2, 2005

mushroom cap

When the tip of the penis is so large and the shaft is so thin, it looks like a mushroom cap.

Condoms feel weird on me because of my large mushroom cap.

by Uncle J J May 25, 2005

mushroom print

when a dude slaps his penis against someone and it leaves a mark like a mushroom.

"You better take that back or I'll give you a mushroom print right across your forhead!"

by ho magnet April 26, 2003

mushroom status

This is the plight occasionally experienced by lower-level college administrators such as department or division chairs in which they are on a short leash as to what they can do, are regularly given a ration of shit, and are kept in the dark.

No budget, no instructions, no discretion or wiggle room; Bill has been consigned to mushroom status and regular Friday afternoon meetings.

by Duckbutt September 23, 2005

mushroom stamping

The act of pressing the head of ones penis into another persons forehead or other facial area.

As soon as Ben passed out, Jer proceeded to mushroom stamp him to no avail.

by Snapdragon August 8, 2003

Mushroom cock

This is usually used as a joke when talking to friends. The penis is normal in shape untill one notices the end, where it has dramatically bulged into a mushroom shape. To get a mushroom cock one can use a lacky band so that the circulation builds up and the head swells. This person usually needs therapy or has a hot date.

Dewy: Sup bro whats been happening?
Jero: Nothing much. Got a huge pain in my penis, it's throbbing like hell. Lisa wont want to see me tomorrow.
Dewy: Hahaha, mushroom cock syndrome? Take that lacky band off the shaft so it doesnt throb you idiot.
Jero: It's not the lacky band, i took that off ages ago. This is prob from the STD i got from the rank chick that thought i had a Watermelon cock.
Dewy: Fuck!! Dude seriously you gotta stop worrying about the shape of your cock it isn't healthy.
Jero: Yer i know but the hoes love it.
Dewy: No they dont.

by Mummas June 19, 2006