Face lift

Face lift was used as a slang for regeneration by some Gallifreyans.

Upon becoming reunited with the Doctor, whom he knew in a previous incarnation, Runcible asked if he’d had a "face lift", to which the Doctor replied ‘several’.

Behind the Scenes
After her appearances in Dynasty, the Rani referred to the Seventh Doctor as "Face lift No. 7", using the term as a synonym for incarnation. The Doctor claimed to accept her new demands for group therapy, more make-up and a hair stylist after she appeared in the series but couldn't stand her usage of this term above all This took place in a story which this wiki does not consider to be a valid source.

In the role world, a "face lift" is a colloquium used by humans to describe a hytidectomy, which is cosmetic surgery to lift up and pull back the skin to make the face tighter and smoother