The term 'BIG BILLS' can be broken down into six crossword solutions: hundreds (8 letters), toucans (7 letters), THOUS (5 letters), emus (4 letters), cees (4 letters), and cnotes (6 letters). Hundreds refers to a denomination of money, specifically one hundred dollars. Toucans is a type of tropical bird found in Central and South America. THOUS is an informal way of saying thousands. Emus are large flightless birds native to Australia. Cees is a slang term for the US one hundred dollar bill. Cnotes is another slang term for the US one hundred dollar bill. All of these terms refer to large amounts of money, hence the phrase 'big bills'.