cosign

/หˆkษ™สŠ.saษชn/

IPA: /K AH0 S AY0 N/

noun
  1. 1

    The promotion of one musical artist (usually less successful) by another.

verb
  1. 1

    To sign a document jointly with another person, sometimes as an endorsement.

  2. 2

    To agree with or endorse

Source: https://en.wiktionary.org/wiki/cosign