blue-on-blue - definition and synonyms

adjective
  1.   From our crowdsourced Open Dictionary
    1
    relating to an attack in which soldiers, etc. are injured or killed by their own army or by soldiers on the same side as themSubmitted from United Kingdom on 05/07/2016
  2.   From our crowdsourced Open Dictionary
    2
    used to refer to fights within the UK conservative party, whose traditional colour is blue

    The blue on blue attacks began with the bizarre suggestion from Richard Drax that all MPs would require permission to speak from Jean-Claude Juncker if Britain voted to remain.

    Submitted from United Kingdom on 05/07/2016