We should make some up.
BANN: Broke-Ass Non-Negotiator. Someone in dire straits who asks the forum for advice, but has a huge list of expenses that are "non-negotiable".
FPSS: Face Punched, Still Stupid. (It might be against forum etiquette to use this to describe other people, but I could use it to refer to myself.)
GBIT: Go Back In Time. "Advice" that involves undoing the past, e.g. "You shouldn't have had those four children."
GE: Good Excuser. Someone who uses a possibly-legitimate but highly situation-specific reason to invalidate advice. For example, "My rare genetic condition makes me allergic to pay-as-you-go cellphone plans... I can't believe that arrogant MMM didn't consider that."
IWIFTSS: I Wish I'd Found This Site Sooner.
IWIFTSBBMV: I Wish I'd Found This Site Before Buying My Vehicle.
NMS: Non-Mustachian Spouse.
Also, a real one we forgot:
SWAMI: Satisfied Working Advanced Mustachian Individual.