to steal one's idea to look smarter
Andrew: "The steam engine was catalyst of the scientific revolution."
Leo "I just said that, Andrew totally smart blocked me."
An abnormally large amount of saliva on an object.
My sister-in-law offered me a slobbery block with my brother standing right there!
In basketball, when an offensive player is poised to score emphatically on the defense, except at the last moment his shot, usually an easy dunk or layup, is blocked with an equal or greater amount of emphasis. The highlight then becomes the embarrassment of the offensive player not making his shot. See also "Posterized".
LeBron James totally Poster-Blocked Jason Richardson's 360 dunk!
When an animal forced to wear a cone around their head is essentially cock blocked from being able to satisfy the itch, lick, bite, smell, etc. they desire so much.
When Princess Petunia got spayed, that bitch was cone blocked for at least two weeks!
When you're in a narrow-ish passageway and one of the two people trying to pass sticks their butt out so freaking far that the other person can't get past without making for one extremely awkward situation.
I was trying to walk down the hallway when he started butt blocking me!
Preventing religious figures from converting others.
I like to shadow Jehovah witnesses and when people finally let them in run up and make a big scene to scare them off, I call it flock blocking