1. pre-op - Noun
2. pre-op - Adjective
Happening before an operation.
a pre-op consultation
Not yet operated on.
(medicine) A preoperative patient or procedure.
(LGBT) A preoperative trans person.
Source: en.wiktionary.orgThe first pre-op class was an hour and a half long and took place at a hospital 30 minutes from Penn North. Source: Internet
Then he took a surprising step: He started cruising online for gay and pre-op transgender men. Source: Internet