Slang – Cheerio Slang – CheerioMeaning – Goodbye. Cheerio is a positive, somewhat lively, farewell.This is British English slang. Example: “It was wonderful to see you today. I’m glad everything is tickety-boo. Cheerio!” Share this: More English:Slang – DenchSlang – Tickety-booSlang – Dilly-dallySee more In Slang British goodbye Slang ← Previous Post Next Post →