nails /neɪlz/noun 1adjective 1phrases 4 noun1 •The four round-topped pedestals outside the Corn Exchange in Bristol on which bargains used to be struck. adjective1 •(UK, slang) Ellipsis of hard as nails.Malik shook his head, stirring the coffee. 'Evans is nails, mate.' — 2018 Phrases with nails bite one's nailsTo worry or fret over something. hard as nailsAble to endure difficulties; tough. spit nailsTo speak or sputter in a very angry manner. tough as nailsHaving a hard, strong, and determined mindset.