βροκός
From LSJ
ἄπαγ' ἐς μακαρίαν ἐκποδών → get lost, buzz off, on yer bike, bug off, bugger off, clear out, clear off, take a hike, beat it, scram, get out of here, get outta here
Spanish (DGE)
Frisk Etymological English
Grammatical information: adj.
Meaning: μωρός, Ἔλληνες H.; βρόκων ἀμαθής, ἀπαίδευτος, οἷον βόσκημα H.
Origin: XX [etym. unknown]
Etymology: DELG refers to βρόκοι ἀττέλεβοι and considers "un emploi plaisant". I rather think of an accidental homonym. Fur. 145 suggests πρόκον ἠλίθιον H. (much more doubtful Lat. bargus sine ingenio).