Fill-in

He went in to the Calsag bar to wrangle two fill-ins for the Goldenhoys as ordered.

Source: wiktionary

I was a fill-in. What that meant was you rode with each salesperson to learn his route, and then you could actually run his route when he was off or on vacation.

Source: wiktionary

All our language is loose: whatever one means to say, all words are fill-ins for other words - as any cursory glance at a dictionary reveals.

Source: wiktionary

When a fill-in, aᵢⱼ⁽ˢ⁾ is created in the course of the computation, it may be necessary to make copies of the contents of certain parts of the ALU and CNLU at the ends of these arrays.

Source: wiktionary