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1. Hob Knocker
One who commits the gross and illegal act of masturbating in a public restroom.
That was gross how saw that hob knocker in that bathroom!
2. hob knocker
One who masturbates in public.

hob - usually a penis, but genitals in general.

knocker - to "knock" or fondle said genetailia(to masturbate).

Derived most-likely from someone with a fancy dialect.
Example 1:"Dude! I was in the theater and I happened to look over my shoulder and I saw that guy from Pee Wee's playhouse(Pee-Wee Herman.) knocking his hob!"

Example 2:"Okay, so I was walking down the street the other day, and I peered down this alley, right? And before my eyes was a homeless man beating off!"

"Ew! Dude! What a nasty hob knocker!"

Example 3:"I like to be a hob knocker, I think people's reactions to me knocking my hob before their very eyes is...well hilarious!"

Example 4:"So, I was off behind Quiznoes being a hob knocker, and I accidentally jizzed on a stray cat!"
3. Hob Knocker
A person who masturbates in Public Restrooms.
Oh My God! Did you hear about that hob knocker and what he did in the bathroom last week at school!?
4. hob knocker
Most famously featured on the show, iCarly, a hob knocker is a word mainly used by English people. In real definition, a hob knocker is a man, during oral sex, hitting a woman in the face with his dick

On iCarly, it is described as illegal. In actuality, it isn't. It's just really fun
Filmer: Hey, Joe! Be a hob knocker and whack the slut with your dick!

Joe: (whacks woman)
5. hob knocker
a guy who stares at girls boobs all the time
geez, christian is such a hob knocker-sam
(christian staring at Sam's boobs)
6. Hob Knocker
A negative, zero social life, loser who knocks other peoples hobbies. Wether they be hunting to football to BMx to D&D, a Hob Knocker will tear down what some people choose to do with their free time, compared to a Hob Knocker who sits on his/her ass in his parents basement looking at pictures and youtube videos of people actually doing shit with their lives.
Regular Guy: I'm going camping this weekend, what about you?

Hob Knocker: *scoffs* Camping??!?! What is this brokeback mountain? So lame.

Regular Women: I'm going to paint a few pictures over summer break!

Hob Knocker: LOL! FAIL! Painting!?!!? You're not making any money on that crap you call painting, so why continue?

Young Kid: I'm going to go BMX riding with my friends!

Hob Knocker: Seriously? What happend when you fall on your ass and crack your head open? YOU COULD DIE! LOL

Young Kid:.....You Hob Knockers have no lives what so ever.

Hob Knocker: *cries on the inside*
7. Hob Knocker
Someone who rapes animals. Hardcore. really hardcore.
"Did you see what that guy did to that squirrel?? what a hob knocker!"
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