cockblocking

cock block

rude slang To interfere with or prevent a man from having a sexual encounter. That girl was totally into me, until you guys came along and cock blocked me!
See also: block, cock

cock-blocking

vulgar slang Interfering with or preventing a male from having a sexual encounter. "Cock" is a slang term for a penis. That girl was totally into me, until you cock-blocking fools came along and ruined it!
Farlex Dictionary of Idioms.

cock-blocking

mod. [someone or something] interfering with a man’s activities with a woman. You’re just a cock-blocking playa-hata.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • cock block
  • cock-blocking
  • cocksocket
  • cock socket
  • snoot
  • cock a
  • cock a snook
  • cock a snook at
  • cock a snook at somebody/something
  • cock a snook at someone/something