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1.
n. vagina

see also clunge, gwat and clive
She lifted her skirt and showed me her clopper. It was beautiful...
by Scruttock January 29, 2006
 
2.
n- Sexual Gratification or Erotica involving ponies, specifically ponies seen in My Little Pony: Friendship is Magic. Generally, the person masturbating to pony erotica is considered the Clopper.
The other day, John saw a picture online of Twilight Sparkle with fully developed breasts. John has been a Clopper ever since
by a1staek July 10, 2012
 
3.
Person or either sex who is sexually attracted to cartoon ponies. Often in a Rule34 setting.
Or uses Rule34 ponies as masturbation aids.

A sub sect of the brony community.
"dude, I just found some awesome porn of rarity doing pinkiepie"

"that's cool, but I'm not a clopper"
by anenglishbrony March 28, 2012
 
4.
A Brony who is into the ponies of the show on a more sexual level than a normal Brony.
Brony: So who is your favorite pony?
Clopper: Well I'd love to cum inside Twilight
Brony: Oh, so your a clopper?
by BrohoofTheWorld April 12, 2013
 
5.
A small portion o the Brony community who makes, supports, and watches 'clop.' 'Clop' is another word for pony porn.
"Hey, you clop?"

"Ya, I'm a clopper."
by Dawnpath December 05, 2012
 
6.
A Brony who is Sick and perverted,. A Brony who makes Clopfics and shipping stories of Ponies from the show My Little Pony: Frienship is Magic. Cloppers Usually support rule 34 and even embrace it. It is Derived from the verb Clopping witch is derived from fapping. Most Cloppers often blend in with other bronies until they share their pictures and Fan Fictions.
Brony: Hey So whats up man? How bout that rainbow dash eh?
Clopper: Oh yes, i made a clop fic of her F***ing Applejack
Brony: You Sick Cloppers and your Shipping
by PS2Gator August 20, 2011
 
7.
1. A brony that forced My Little Pony porn onto other people, especially when it is unwelcome.
2. A stain on the brony community.
3. A self entitled asshole
4. An individual who's purpose in life is to ruin My Little Pony of other people.
P1: oh you like mlp?
P2: Yeah, but it's mostly the porn.
P1: You're a clopper? WTF is wrong with you?
by TimeTime September 02, 2014