Hey you! Yes, you! Thank you for adding beauty to the world!
Definitions of cock-up:
noun: (UK, mildly vulgar slang) A mistake.
noun: (obsolete, UK, printers' slang) A superior letter. A lower-case letter placed above the baseline and made smaller than ordinary script; traditionally used in abbreviations.
noun: (obsolete, Scotland) A roll or twist of hair worn at the nape of the neck; a bun.