from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. superlative form of shrieky: most shrieky.
Sorry, no etymologies found.
If only the same could be said about Ian Watkins who, on hearing his name called out, immediately turned into the shriekiest campest children's television presenter in the world and took the Celebrity Big Brother interview as an opportunity to indulge himself in a display of world-class simpering so Herculean that all the buttons on his shirt popped off as a protest.