To be eager, excited or interested in something/someone. A word of many facets.
Q: "We should watch Fresh Off the Boat tonight"
C: "Yeah, I'm totally keen!"

Q: *takes a large bite out of phallus shaped chocolate bar*
C: "Damn, you keen!"

Q: "Let's have tacos for dinner!"
C: "Nahhh, I'm not that keen on Mexican"
by Rain1110 March 14, 2015
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1)Eager to do something, or someone.
2)Used to describe someone who is ready and willing for sex, anywhere anytime.

1) are you keen for a pizza matt?
2)
joe. do you think she'd go a three-way?
marcus. yeah, she looks pretty keen
by matthew szwec November 01, 2007
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eager or obsessive about someone or something.
that girl is so keen on hooking up with you.
by linds January 11, 2005
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used to describe something that is in a good state, or prudent

synonyms: rocking, cool, smart
my new shirt is keen!

keen of you to do this assignment the night before it was due!
by Anonymous March 11, 2003
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Something so cool and original and great that everyone loves it so much; something that is super swell

Being brought back by Ms. Emily of Brown College fame @ UVA
Man these chocolate chip cookies are Keen; Dude that book is so keen; The white spot is super keen
by Matt November 14, 2004
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1. To be eager/enthusiastic about something.

2. A word that can be used instead of cool.

3. Sounds like the word keane which is the name of a really shit band.

4. A person who's real name is Mark Smith.... he's a twat.
"My god!! I am so keen to do this thing that i want to do!!"

"Dude, that tissue box is keen man."

"I went to see Keane in concert, they weren't keen, the were fucking awful."

"don't talk to Keen, he's a real twat... he comes up with bullshit replys that make no sense to every insult you throw at him."
by Smoulder March 13, 2005
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