Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. Informal Insignificant value: not worth a red cent.
Wiktionary
- n. US A copper penny.
- n. US, colloquial A very small amount of money.
WordNet 3.0
- n. something of little value
Etymologies
- Probably from the color of the copper in which the coin was minted. (Wiktionary)
Examples
“Gone to make do and mend, thinks I - and since H didn't have a red cent to requite her, it struck me as a capital time to resume my scattered togs and make tracks for the ministry.”
Lists
These user-created lists contain the word ‘red cent’.
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EN - coloured collocations
The bad news: There are possibly tens of thousands of colour collocations in English. The good news is that the pictures retrieved by Wordnik from flickr will probably match the terms this time.
black currant, black eye, black pudding, blue baby, Blue Beard, blue bell, blue berry, blue blood, Blue Book, blue bottle, blue cheese, blue chip and 280 more...
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red phrases /words
how red is used
red bag, red ant, red-armed, red ale, red alert, red alder, on red, red adder, in red, in the red, bushy red mint, California red scale and 764 more...
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the catch-all
inveigle, frontier, invective, quizzical, merit, proficiency, eleemosynary, ham-handed, circumspect, epergne, cobble, industriousness and 201 more...
Tweets
Looking for tweets for red cent.

rolig "The devil only knows where she gets her booze since she never has a red cent!"
– Slavko Grum, An Event in the Town of Goga Dec 4, 2007