An indeterminate, dark blob appearing in photos or video purporting to display bigfoot. The blob in question may or may not be a man in a gorilla suit, a man not wearing a gorilla suit and simply standing further from the camera, a bear or a merely a smudge on the lens.
When you're doin' it doggy-style in your girlfriends front room while you're watching Space Jam, you blow your load, pull out, she stands up and huge cum blobs fall from the heavens.