A dire medical situation in which a male human has BROKEN his erect penis.
Although the penis is not really a bone - it only feels that way 90% of the time! - it can still be broken, if enough force is applied at the correct angle (e.g. falling on it, or slamming it in a door).
Often, there is an audible "cracking" sound accompanying this tortuous, apocalyptic event. And, like a broken bone, the fractured penis needs to be "set" as soon as possible after breakage occurs, to ensure proper healing.
A broken penis is a medical emergency, so if you are experiencing the symptoms of bucklecock (screaming in pain, penis misshapen and pointing off at a sickening angle, significant other has feinted from the sight of it, etc.) then I implore you to stop reading this and seek professional medical assistance immediately.
I fell out of bed last night and got bucklecock! When I wouldn't quit screaming, my girlfriend taped a tennis ball in my mouth and drove me to the emergency room, where everyone laughed at me while I laid under a table, whimpering.
1)Condition created from the consumption of excess alcohol resulting in temporary impotence.
2)Condition created from seeing extremely fat or ugly women resulting in temporary impotence.
When I saw her face it was total bucklecock, dood!