The name for what your penis looks like when only the head of the penis fills with blood and you don't actually have an erection. It could happen when sitting down and then standing up quickly or anytime.
I was sleeping and right when I woke up and headed for the bathroom I noticed my hammerhead
by jive robots November 02, 2010
A person with a head resembling a hammer, usually with no chin.
Did you see that kid back there?
Ya. One ugly ass hammer head chunkard.
by OwlTurtleMeerkat October 06, 2010
When a rectangular object is placed sideways under the foreskin, making the penis resemble a hammerhead shark.
A kinky girl i am seeing put a domino in my foreskin last night, it made my cock look like a hammerhead shark.
by bosteonerbeka March 22, 2010
when the foreskin of an uncircumcised penis is stretched forward, then twirled and folded tightly to give the penis the appearance of a hammer head shark
bogart: matt that is nasty
matt: respect the hammer head!
by crocock May 14, 2009
A girl lays on a bed legs spread, vigorously double fisting her vagina, while a guy stands at the far corner of the room and he is bending over. He places his hands on his head thus imitating the dorsal fin of a shark. He charges forward toward his pray and plows that pussy into oblivion with his head creating the image of the elusive hammerhead shark.
Wow my vagina hurts. WHY? My boyfriend hammerheaded me several times yesterday.
by B2daALLZ September 01, 2006
A penis with a very large head. Often causes bleeding and/or causing the other person to become awestruck.
'Check out that hammerhead!'

Another word meaning fucked hard.
Wow, that massive shaft is such a hammerhead!
by willie989 January 18, 2010
Another word for a good looking girl.

ie: biddy

pronounced *ham*-*ah*-*head*
"Check out the tatties on that hammerhead!"
by TheFirstDoc September 12, 2009
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