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
- 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