OBAFGKM

AcronymDefinition
OBAFGKMOh, Be A Fine Girl/Guy, Kiss Me (mnemonic for the order of star temperatures)
OBAFGKMOnly Boys Accepting Feminism Get Kissed Meaningfully (mnemonic for the order of star temperatures)
OBAFGKMOnly Bad Astronomers Forget Generally Known Mnemonics (mnemonic for the order of star temperatures)
OBAFGKMOfficially, Bill Always Felt Guilty Kissing Monica (mnemonic for the order of star temperatures)