Knocker
Part of speech: noun
Definition: A device, usually hinged with a striking plate, used for knocking on a door. A person who knocks (denigrates) many things. A woman's breasts. A dwarf, goblin, or sprite imagined to dwell in mines and to indicate the presence of ore by knocking particularly in Cardigan etc. in South Wales (18th..19th century).
Rapper
Part of speech: noun
Definition: One who, or that which, raps or knocks; specifically, the knocker of a door.A performer of rap musicA forcible oath or lie.obsolete: Scottish English word for "sword."A flexible strip of metal, 45-60cm long, with handles at each end, used for Northumbrian rapper sword dancing.A mechanical, or later electric, signalling device formerly used in the mines of north-eastern England to signal to the engineman that the cages carrying men or coals up and down the shaft were ready to be raised or lowered.
Example sentence: The first splurge that I did, I bought, like, an $80,000 watch, but that's because I'm a rapper. I need jewelry.