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1.
A domesticated member of the family canidae, not necessarily a cocker spaniel, which jumps up on the bed while two humans are engaging in heated intercourse. This usually occurs right as one is about to climax.

This unwelcome interruption completely ruins the moment. The offending dog, which may or may not be a cocker spaniel, is usually jolted off the bed by a quick kick, followed by an awkward resumption of intercourse.

Note: the dog must be a cocker spaniel.
Couple: *grunt grunt*
Dog: *leap*
Couple: fuk off u cock blocker spaniel
Dog: *sad howl*
by BzBurger February 07, 2010
 
2.
when a guy or girl gets cock blocked by a dog barking, whining, scratching or any other distracting/annoying behavior. particularly when its only problem is that it's just more of attention hound than you are.
i was stopped cold by her cockblocker spaniel barking and scratching at the bedroom door.
by jayt85331 January 06, 2014