a person who has the reflexes of a cat, balls of steel and a head full of nothing, walks up to or next to a girl(preferably in a public or crowded area) and so fast and quietly slaps the girls ass when she turns to slap or spot the man...he has already vanished into the crowd using ancient blending techniques honed over countless days of playing only assassins creed!
assassin:hey dude wana learn how to assassinate a girls ass? i will teach you the ancient ways of the.......

dude:nope!

assassin: but whyyy?

dude: because i have a girl friend and dont slap random girl asses and masturbate to video game chicks... bye!

assassin:.............douche!
by Dr maeder November 17, 2010
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A trained killer hired for money to kill other people.

Assassin is also a song by the rock band Muse, it is probably the heaviest song on their new album
Guy 1:"I'll give you, being an assassin, £300 to kill this guy"
Guy 2: "Just a sec, I'm listening to this awesome song by Muse!"
by Tommy P1313 March 1, 2007
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as¡¤sas¡¤si¡¤nate¡¤ (¨¡t¡ä)

transitive verb

to murder (esp. a politically important or prominent person) by surprise attack, usually for payment or from zealous belief
to harm or ruin (someone's reputation, etc.), as by slander, vilification, etc.

- your mission is too asses....assiss...assas...TO KILL A GUY (top gun version)

Powerful people fear that someone will try to assassinate them.

by Noka October 31, 2007
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A hardcore ninja that doesn't care for all that Natrutard crap.
1.) Altair of Assassin's Creed
2.) Orange Jumpsuit Nazis
by Eroth December 26, 2007
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1) noun. Assassins were first referred to as Hashashins because they were given hashish and taken into a little garden slice of paradise. They were then told that if they died in their lord's service they would automatically return in death to this paradise, and have a harem of women. This was eventually shortened to assassins.
2) Adverb. To whoop some dude's ass with Kungfu grip.
Yo, man, that dude was straight out goin' assassin on them niggaz.
by Andrew December 10, 2002
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What one must say after punching someone in the back in Halo, generally followed by a quick session of teabagging.
It was 49-49 and I walked up to the laser tower, assassinated the guy charging his laser while exclaiming "assassinator", and teabagged him as the screen faded to black, giving us the victory.
by JJ3672 March 29, 2008
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1. A contract killer.

2. The best type of girlfriend to have. If you have an assassin girlfriend, you got twice the ass for the price of one.
1. Are you a real assassin? Bill at the office has been bugging me, can you fix that?

2. To get an assassin girlfriend is way better than getting a BOOBY TRAP girlfriend.
by CriticalDesign January 9, 2008
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