1. a mental condition wherein one forgets where his balls are, usually resulting in spineless actions and mannerisms.
2. in bowling, throwing several strikes continuously, and then suddenly losing your rhythm for no apparent reason, resulting often in one if not many poor throws.
1. "bro, jerry was saying how he was gonna tell his boss off for cutting his hours, but then he contracted ballsheimer's at the last minute and didn't say shit."
2. "i don't where my A game went, man, i think i got ballsheimer's."
When the penis of a man is so small in size, that he lacks a "shaft." There's just balls and then the head. Ballshead. It can also be used to refer to anything that is a huge disappointment, or generally lame.
To correctly pronounce this word, it must be said very rapidly, and in one syllable.
Mary: "So I finally had sex with Steve, and he was ballshead. I can't believe it."
A condition afflicted by golfers who seem unable to see where anyone else’s ball has landed except their own. Typically, the afflicted individual is the cart driver.
Once again, Steve’s ballsheimers has kicked in. He has driven directly to his own ball after teeing off; bypassing his partner’s .