The words are fairly obvious:
Brexiter=Someone who supported Brexit.
Bremainer = Someone who would like to remain in the EU.
Bremoaner = someone who moans about the vote. Either side but losers seem to have it worse.
Remnant = offensive name for a Bremainer who is annoying. Surprisingly common on this board.
Racist = an unsupported slur used against people who voted for Brexit.
Cretin = the word SasGuru is proud he can spell.
Happy to use other terms if you can supply them.
By the way Brexiteer & Bremainer are in common use by Dictionaries & the broadsheets so lets assume they are real words and you are just out of touch.