From Longman Dictionary of Contemporary Englishdaisydai‧sy /ˈdeɪzi/ noun (plural daisies) [countable] 1 
HBPa white flower with a yellow centre2 → be pushing up (the) daisies → as fresh as a daisy at fresh1(11)
HBPa white flower with a yellow centre2 → be pushing up (the) daisies → as fresh as a daisy at fresh1(11)Examples from the Corpus
daisy• It had a wicker, flower-girl basket of pinks and daisies in its mouth.• I had been thrown off the cricket team at school for making daisy chains on the boundary.• To create the second scene the sun and row of daisies are knitted as if reflected in water.• But the daisies will be happy to have a good place to grow, in such a safe sunny corner.Origin daisy Old English dægeseage “day's eye” 