A plural conventional Italian title of respect for youngmen.
From the movie, "Sweeney Todd" with Johnny Depp.
Pirelli sings during shaving, "Now signorini, signori, we mix the lather. But first you gather around, signorini, signori."
The attribute a person has when they leave their directional signal on in their car for extended periods of time, while they are oblivious to that fact.
That person ahead of us has had their directional signal on for miles! They have signorance!