Definition of "no-op"

no-op¹

noun
plural no-ops
1. (computing) An instruction or operation that has no effect; a null operation.
  Quotations
  Points may be coincident and the number of specified points can be zero, in which case the function is a no-op.
  1991, Graham C. E. Winn, OS/2 Presentation Manager GPI
  A JMP instruction qualifies as a no-op in this sense.
  1999, Donald Knuth, MMIXware: A RISC Computer for the Third Millennium

no-op²

adjective
not comparable
1. (LGBT, of a transgender or transsexual person) Having chosen not to undergo sex reassignment surgery.
  Quotations
  Both ‘no-op’ interviewees hold relatively stable identities as TG and offer interesting perspectives on trans repudiation from a TG standpoint.
  2008, Christopher Shelley, “Introduction: Transpeople and the Problem of Re/Action”, in Transpeople: Repudiation, Trauma, Healing, Toronto: University of Toronto Press, page 12
noun
plural no-ops
1. (LGBT) A transgender or transsexual person who has chosen not to undergo sex reassignment surgery.
  Quotations
  At the time of the interviews, nineteen of the twenty interviewees were taking hormones; five were pre-operative; thirteen were postoperative; and two were ‘no-ops’ (no surgery intended at the time of interview).
  2008, Christopher Shelley, “Introduction: Transpeople and the Problem of Re/Action”, in Transpeople: Repudiation, Trauma, Healing, Toronto: University of Toronto Press, page 12