A noun, indicating a person with 3 initials corresponding to the 3rd letter of the alphabet.
After falling in love with Christi Carrie Arthur, her soul mate (Mr. C.) proposed, married her, and subsequently her initials became "C3."
A chance loan that allows you to take a loan without having to pay back the entire amount you took out, but only half.
The C3 loan just saved my business from failing.