high and low
US /haɪ ənd loʊ/
UK /haɪ ənd loʊ/

1.
in lungo e in largo, dappertutto
everywhere; in many different places
:
•
I've searched high and low for my lost keys.
Ho cercato in lungo e in largo le mie chiavi perse.
•
They looked high and low for the missing child.
Hanno cercato in lungo e in largo il bambino scomparso.