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1.
A whore, mountain goat, adventurer, explorer, gypsy, wizard, spanish fly and grease monkey all rolled together into a one person.
The one and only Jypsy J (AKA Jansen).
by jypsyjansen. March 25, 2009
 
2.
Term used for having sex in a popular MMORPG known as RuneScape. This sex can be homosexual, heterosexual or even beastly.
Guy 1: I just had a Jansen.
Guy 2: Hmm... Sounds fun.
Guy 1: Why don't we do this right now?!
Guy 2: I'll get my laptop!
Guy 1: I have my Iphone so I can do this 2, 3, 20 times a day!
by Pescados666 October 28, 2007
 
3.
An important figure in the progression of RuneScape Cheating. Moderator of several forums and a very respectable fellow.

See RuneCMS
Jansen is awesome, I wish he was gay so I could marry him.
by Lysol! March 30, 2006
 
4.
When something is exceptionally remarkable, so much that it drives you to compare it to the the artist Theo Jansen. Theo Jansen created kinetic sculptures. Kinetic sculptures are creations of Jansen's that resemble large animals (rhino or elephant sized) which roam beaches and are powered by the wind. Jansen names his moving animal-like sculptures as if they were new species of living animals. This justifiably likens him to a creator of life, or god, and anything compared to him is effectively very cool.
synonyms: awesome; cool; radical; remarkable; wicked; sick; etc.

antonyms: stupid; dumb; retarded

Uses:

1. i was at the club yesterday and, with respect to your outstanding dance moves, i was like, "your fucking jansen!"

2. this food is great, its fucking jansen.

3. kristina's booty moves faster that a fucking jansen sculpture. She's jansen!

etc
by maparipijapan October 22, 2010