blue-on-blue

adjective

1. military of or relating to friendly fire

   blue-on-blue contacts

Word History and Origins

Origin of blue-on-blue¹

C20: from the colour used to mark a country's own troops and allies on a military map

Example Sentences

There were few "blue-on-blue" clashes during the campaign.

From BBC

Jenrick, who trailed Badenoch for support in the last voting round of MPs, has previously signed up to the yellow card penalty system introduced at the start of the contest and intended to stop "blue-on-blue" infighting.

From BBC

The two contenders to be the next PM did not hold back from "blue-on-blue" attacks in the hour-long BBC special.

From BBC

For all the talk of wanting the "blue-on-blue" attacks to subside - this debate showed they haven't gone away.

From BBC

When asked about the blue-on-blue attacks with Tory MPs criticising each other, he said: "We have seen a debate about ideas."

From BBC