verb/nə pa ɛ.tʁə pi.ke de an.tɔ̃/
to be pretty good, to be quite something, to be excellent
“Il fait à Aix, l'hiver, un petit froid qui n'est pas piqué des hannetons.” — In Aix, in winter, it gets a bit chilly, but it's not bad at all.
Synonyms: ne pas être piqué des vers
Literally, “not being bitten by cockchafers”, a litotes. Compare English there are no flies on someone/something.