Green’s Dictionary of Slang

fleggy n.

[SE phlegm]

(UK juv.) a gob of spit.

OnLine Dict. of Playground Sl. 🌐 fleggy n. Spit which includes mucus, e.g. a ‘greeny’, e.g. ‘I just flegged in that’; ‘You’ve got a fleggy on the back of your coat’.