Fink verb – To give information (as to the authorities) about another's improper or unlawful activities. Let on and fink are semantically related. In some cases you can use "Let on" instead a verb "Fink". Nearby Word: finking
Let on verb – To take on a false or deceptive appearance. Fink and let on are semantically related. Sometimes you can use "Fink" instead a verb "Let on".