A euphemism for dickhead. This is based on the image of a unicorn with a droopy horn being akin to a penis on a head.

More appropriate for situations such as the workplace, where more overt swearing is difficult.
Lauren wouldn't let me borrow her pen today - she's been a real limp unicorn recently
by TinyBabyBear May 31, 2011
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When you cut someones dick off and sew it to there head. Therfore resembling a unicorn with a floppy horn.
I'm going to make you a limp dick unicorn!
by 100%Real May 6, 2015
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When you cut someones dick off and sew it to there head. Therfore resembling a unicorn with a floppy horn.
I'm going to make you a limp dick unicorn!
by 100%Real May 6, 2015
Get the limp dick unicorn mug.