look up any word, like blumpkin:
 
1.
Used to describe an event that a person thought would previously be wicked cool and fun, but ended up sucking hard core. Named for Kevin Costner, the actor, whose movies look good in previews, but are usually bad when watched.
Man, that U2 concert was so Costner.
by Piggly Wiggly September 04, 2005
11 6
 
2.
Another name for a happy ending, full release, or hand job. Named for actor Kevin Costner due to his hotel happy ending scandal.
Duddddde, she wouldn't blow me, but she gave me an amazing costner.
by SouthLemon August 18, 2011
3 3