Hashdash 

The run you do for some weed, when you've run out

Dude, we've run out, I need to go on a hashdash,

Hashdash by jaffaw July 14, 2009

Hashashin 

A Sect of Iranian Shi'a Islamic Muslim which existed during the crusades. Founded by Hassan Sabah at the fortress of Alamut in 1090 A.D. They were known for Assassinating leaders of the knights templar, often under the influence of the drug hashish. Brought into the light in recent times by the game Assassins Creed, where the player character is a Hashashin assassin.

Person One: "I love the hashashin!"
Person Two: "Why?"
Person One: "If not for them, we would not be smoking hash !"

Hashashin by eskdziaee April 13, 2009

Hashmash

On Twitter or other social media sites, a hashmash is a posting that is so full of hash tags it doesn't make sense to anyone reading it.

#Colbert buys #eagles for #USDollarCoin at #AmesStrawPoll #GOP #pawlenty #travis #hashmash.

Hashmash by chondrichthyes August 20, 2011

HashRash

Also referred to as #Rash, an all too common twitter affliction of the over use of hashtags.

A major cause of HashRash is politics, resulting in tweets that say nothing but "#TCOT #TPOT #Porkulus #Stimulus #Congress #Teabagging #Teaparty #Fixednews #NObama #Iran #Pakistan"

HashRash by Atombrahms June 27, 2009

hashashin 

Follower of hashish, or the ancient form of the word assassin.

I got stoned last night and played Ninja Gaiden until I passed out.

Dude, you're such a hashashin!

hashashin by Flawless Walrus June 11, 2006

Hashbash 

The act of getting someone so drunk that they are unaware of what they are doing and then you perform a sexual act on them, essentially known as drug rape. Hash = Drug, Bash = Sex, Hash + Bash = Sick rapist

Jim: 'Whoa look out I think Harry might Hashbash her, she is off her face, we should intervene.' Dave: 'Yeah your right lets stop him'.

Hashbash by HMol November 6, 2007

Hashbasher 

1. A person who Hashbashes someone, but does not learn their lesson and it is known that they will strike again.
2. A Person who will Hashbash and has probably done so before

1. Jim: 'Don't you think that Harry is the biggest Hashbasher you have ever met?'. Dave: 'Yeah definitely but you know he will Hashbash again'.
2. Dave: 'I heard that he got her drunk and raped her last night'. Jim: 'What a Hashbasher! I bet it's not the first time that he has done it either.'

Hashbasher by HMol November 6, 2007