Factual error: Early the movie, the maroon 1972 Monte Carlo at the intersection in the background is sporting wheels from a 1984 IROC Camaro Z28.
Factual error: When Ritchie was following the driver with $20k into NYC, the scene shows the GWB entrance heading to NJ.
Factual error: The movie takes place in the late 1960s/early 1970s, but during Richie's pursuit of the Bronco, trains of R142 subway cars, not introduced until 2000, can be seen in the background. (01:11:15)
Factual error: In the scene where Frank Lucas drives to meet Nicky Barnes, a 2002 Lincoln town car as well as an NYPD traffic cop redirecting traffic are visible. (01:44:25 - 01:45:00)
Factual error: A few moments after the 20% rent deal for $1 in the cafe you can see a 747-400 (or later) in the sky, the winglets identify it as such. The 747-400 had its maiden flight in April 1988. That scene plays in 1968.
Factual error: As Lucas is leaving the bar to make a call to Saigon, a modern blue car passes outside, seen through the curtains. (01:51:55)
Answer: "Kike" is an ethnic slur that refers to Jews. To elaborate, when illiterate Jewish immigrants would be asked to sign their names on Ellis Island, they would simply put a circle on the signature line. The Yiddish word for "circle" is "kikel."
OneHappyHusky