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.
*friend, later that night after jacking off: sex lasts so long parents interrupt, meaning he couldn't finish*
Friend: Damn, he totally spockblocked me!