Peggy Dell, n. — Green’s Dictionary of Slang

Peggy Dell n.

[rhy. sl.; ult. Irish pianist and entertainer Peggy Dell (c.1905–79)]

(Irish) a smell.

2000		F. Mac Anna Cartoon City 202: Has anyone noticed the strange Peggy Dell about this place? [...] ‘It’s the algae,’ Mia said.
2001		G. Coughlan Everyday Eng. and Sl. 🌐 peggy dell : (the) smell.