Humbug is perhaps most famous for being said by Scrooge in A Christmas Carol, and is now usually said by someone who is not feeling in the Christmas spirit, but it has other meanings too…
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A rev is an informal term; it is an abbreviation for a revolution of the crankshaft within an engine. The related verb means ‘to accelerate’ and it can have an engine, vehicle, or driver as its subject. Rev is also used figuratively, often followed by up, about other things and means ‘to increase’ in both activity and…