The term SNITCH (ON) can be broken down into three crossword solutions: RAT (3 letters), NARC (4 letters), and BLAB (4 letters). A snitch is someone who informs on another person, usually to the authorities. The word 'RAT' is a slang term for a snitch, while 'narc' is short for 'narcotics agent, ' which is a law enforcement officer who specializes in drug-related crimes. Finally, 'BLAB' means to talk too much, often about something that should be kept secret. All three words are used to describe someone who gives away information that could incriminate another person.