(Noun) Any time during which Mr. Spock's infallible logic prevents humans from making poor choices with their inferior intellect.

(Verb) To perform the act described above, which you can only do if you are Mr. Spock, and you are not.

(Adjective, ending in -ed) To be on the receiving end of a Spock block. In many space cultures of the future this is considered the greatest honor a man can receive.
When Captain Kirk tries to regain control of the Enterprise in part 1 of "The Menagerie", he is Spock blocked by the Vulcan's clever hacking skills and cannot override the ship's computer.
by Hungry Like the Worf August 26, 2010
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whereas captain kirk keeps getting all the green intersteller women and not saving any for his wingman mr spock. (similar to cock blocking except it happens in the future.)
in a bar mr. spock was getting close to sealing the deal with a romulain female when captain kirk beamed in and totally spock blocked him.
by ragnar's vw May 13, 2009
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When your friend- who looks strikingly like Spock from Star Trek- engages in behavior similar to cock-blocking. Often in brutally failed attempts to hook up with your girlfriend, or prevent you from doing so.
John: Dude, did you get any action last night?

Mike: No, Andrew was fuckin spock-blocking me again.

John: Lame.
by JohnWayne1992 February 5, 2010
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Any person, action or situation that prevents one from watching Star Trek (applies to the original series).
Last night, the Yankee game ran late and Spock blocked me again.
by bafervaf September 9, 2010
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Resulting condition: In which Kirk endeavored to learn Lt. Uhura’s first name and was defeated upon learning of her continuing relationship with Commander Spock.

Likewise;

Commander Spock’s surprising kiss with Lt. Uhura on the transporter, leaving a flabbergasted Kirk to look on in surprise.

All definitions under stipulation of Star Trek, the 2009 film directed by JJ Abrams.

In normative terms: Receiving rejection from a girl because of a pre-existing relationship or partiality with/to another, completely expected guy.

Not to be confused with the term spock block, which denotes that Spock is the one being blocked and not Kirk.
{After having been turned down, a guy returns to his friends, all of which then watch another, much less 'qualified' male approach the woman, ready to laugh at his impending failure. When she leaves with him, all the friend's buddies have a laugh at his expense, calling out "Spock Blocked!" in mocking tones.}
by zeldafire May 21, 2010
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Introducing Logic into a conversation to counter an obviously asin9ine statement. Successfully.
'Man, I thought my argument supporting Arizona's immigration laws was valid. Until you pointed out that a law that circumvents The Bill of Rights for illegals, circumvents the Bill of Rights for us all. You totally Spock Blocked me!"-----Spock Blocking
by JudasCow June 14, 2010
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