fizgig /ˈfɪzɡɪɡ/noun 5verb 2forms 3 noun5 •(slang, old-fashioned) A police informer, a stool pigeon, someone employed by police to entrap someone else or provoke them to commit a crime.In order to make the clause perfect the Minister might add— / All "spotters," spies, fizgigs, and informers will be properly rewarded, and duly promoted, and guaranteed against publicity. — 1922 •(Scotland, rare) common ragwort (Jacobaea vulgaris, syn. Senecio jacobaea).S[enecio] jacobaea. Ragwort: Yellow-weed: Yellow elshinders, and in the Merse [Berwickshire], Fizz-gigs.—A common weed in old pastures and by road-sides. — 1853 •(no longer used) A small squib-like firework that explodes with a fizzing or hissing noise.Half a dozen boys in linen blazers, their hair in uniform flattops, were shooting off fizgigs in his alley and paid him no mind as he pretended to use his key to unlock the alley-oop door. — 2008 •(no longer used) A flirtatious, coquettish girl, inclined to gad or gallivant about; a gig, a giglot, a jillflirt. •(no longer used) Something frivolous or trivial; a gewgaw, a trinket. verb2 •(slang, old-fashioned) To act as a police informer or agent provocateur.Easy, Frank. I don't want any terror. Just a line on Catchpole—who he's fizzgigging for at the moment. What might be going on. — 1985 •(no longer used) To roam around in a frivolous manner; to gad about, to gallivant.Why should I go gadding and fizgigging after firking flantado amphibologies? — 1594 formsfizgigged · fizgigging · fizgigs