a rotta di collo
Italian
Etymology
Literally,
“
at break of neck
”
.
Prepositional phrase
a
rotta
di
collo
at
breakneck
speed
; as
quick as a flash
Further reading
rotta
1
in Treccani.it –
Vocabolario Treccani on line
, Istituto dell'Enciclopedia Italiana