fuori fase

Literally, “out of phase”.

fuori fase (invariable)

1. (mechanics) out of phase (of a motor)
2. (idiomatic, by extension) off one's feed, under the weather, out of it

   Synonym: giù di corda

   • 2012, John Green, translated by Giorgia Grilli, Colpa delle Stelle, Mondadori, page 138:

     Ho sistemato i cuscini per poter giocare a Counterinsurgence sul materasso senza lenzuola, ma lui era così stanco e fuori fase che sbagliava quasi quanto me, e dopo nemmeno cinque minuti eravamo già morti tutti e due.

     I arranged his pillows so we could play Counterinsurgence on the bare sheetless mattress, but he was so tired and out of it that he sucked almost as bad as I did, and we couldn't go five minutes without both getting dead.

     (literally, “I fixed the pillows to be able to play Counterinsurgence on the mattress without bedsheets, but he was so tired and out of it that he made mistakes almost as much as me, and after not even five minutes we were both already dead.”)