Since a long time ago.

(colloquial) Since a very long time ago.

(Canada, US, colloquial) Since a very long time ago.

(archaic, slang) Since an extremely long time ago; since long before living memory.

(idiomatic) Something amazing, outstanding or praiseworthy, especially a relatively recent invention likely to improve people's lives.

(idiomatic) Alternative form of greatest thing since sliced bread

(Ireland, idiomatic) Alternative form of greatest thing since sliced bread

Synonym of since Adam was an oakum boy

(idiomatic, chiefly Britain) A polite, formulaic phrase used at the end of a letter, especially when the sender knows the recipient's name.

Genuine; meaning what one says or does; heartfelt. / Meant truly or earnestly. / (archaic) clean; pure