Green’s Dictionary of Slang

crater n.

1. (US campus/teen) an acne scar; thus craterface, a term of abuse used to mock an acne sufferer.

[UK]I. & P. Opie Lore and Lang. of Schoolchildren (1977) 192: The names their friends call them: Bumps, Dimples, Crater-face.
[US]Baker et al. CUSS 101: Crater A pimple. [...] Crater-face One with a bad complexion.
[Aus]T. Davies More Aus. Nicknames 40: Crater Face Is afflicted with bad acne.
[UK]Guardian G2 14 Feb. 4: Trinny doesn’t mind being called a [...] craterface either.
OnLine Dict. of Playground Sl. 🌐 crater-face adj. derog. term used to describe someone with really bad acne or similar.

2. (US drugs) an abscess that is caused by the long-term injection of narcotics.

[US]P. Thomas Down These Mean Streets (1970) 202: I had cultivated a crater and always shot through the same hole. It sure looked awful, though.
[US]E.E. Landy Underground Dict. (1972).
[US]Allen V. Lloyd Drug Abuse.