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

Hash Bash 

Hash Bash is an annual event organized by the Michigan National Organization for the Reform of Marijuana Laws (NORML). It takes place on the first Saturday of April in Ann Arbor, MI on the campus of The University of Michigan. At high noon on the Diag there are speakers and rallying and afterwards a street fair on Monroe. Ann Arbor has a $25 civil infraction fine for smoking marijuana on city property.

"Who wants to split this brownie with me before we go to Hash Bash?"

"Oh shit, I better take off from work for Hash Bash!"

Hash Bash by Julie! April 1, 2007

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

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