These are all Tiktok slang, as far as i understand. Accountants or ‘spicy accountants’ are Like strippers or Sex workers? The inside joke is that its such a boring job that if someone asks what you do, and you reply accountant, you won’t get any follow up questions.
Unalive is slang for suicide, I guess videos with suicide in them don’t get promoted.
Corn is porn, same idea with self censoring to get around content issues