λῃστρικῶς
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
adv.
comme des brigands.
Étymologie: λῃστρικός.
λῃστρικῶς: по-разбойничьи Plut.