Boner Monster

A huge walking erect penis, who steals others penises so that it can get bigger and harder. Be careful though unprotected sex attracts the beast.

Dude last night i banged Sara. -man 1
Did you use a condom? - man 2
Nah... -man 1
Damn dude watch out the Boner Monster might come for you. -man 2

by M Smiddy July 22, 2011

Monster Teflon

A “large” clean bowel movement which requires no wiping or clean-up job later, see Teflon

Example:
- “Why are you looking so pleased with yourself?”
- “Dropped a Monster Teflon mate, ripped the hole big time”

by The Spike February 21, 2007

monster mash

When a collection of monsters have a party and spend the evening dancing with no regard for others

oh my god Nigel, the monsters next door are having a monster mash again they will keep us up all night again.
Can you go around and have a word with the chief monster 'Paul' and ask him not to make them strange ape noises again

by Neil O'Malley July 12, 2006

Fudge monster

A really big turd,so big that it fills the entire toilet.

Woww dude that fudge monster is fucking huge!!!!!

by Pseudonymoustrous July 24, 2012

Monster boots

A pair of ass-kicking boots, normally combat boots or platforms, Demonia makes a lot of bad ass ones.

Holy shit did you see her monster boots, she could totally kick your ass!

by Jade Lilli December 22, 2009

Nuzzle Monster

A girl that nuzzles, frequently with an upward motion of the head. Nuzzle monsters are cute, accelerate time, and make the very best girlfriends.

Ashlee is so cool and loves to cuddle, she's such a nuzzle monster!

by mikefw9 April 29, 2011

Semen Monster

After you cum, the uncleaned semen group together to form a chunky piece of shit -the Semen Monster. The leftover semen can come from a variety of places: laptops, bathrooms, tissue paper, vaginas, even your belly button. As the Semen Monsters multiply, they scheme to take over all vaginas, and pollute our offspring with semen DNA. Nasty stuff!

Timothy: Hey, just finished jacking it.
Lancelot: Ooh, better clean your junk, the coagulated semen might group together and burst out of your cock and turn into a Semen Monster.
Timothy: Just like in Alien?
Lancelot: Just like in Alien.

by thighmaster69 November 10, 2018