In “Bad Teacher,” Cameron Diaz’s character covers an apple in poison ivy.
Elizabeth Halsey, played by Cameron Diaz, uses the apple as part of a nasty scheme against fellow teacher Amy Squirrel. She smears the poison ivy onto the fruit and leaves it where Amy will handle it, hoping the resulting rash will keep Amy away from a school field trip. The scene turns an ordinary piece of fruit into one of Elizabeth’s many deliberately malicious tricks.
The answer is sometimes confused with the film’s broader “bad apple” imagery, but the object specifically shown in the poison-ivy plot is an apple. “Bad Teacher” was released in 2011 and was directed by Jake Kasdan, with Diaz joined by Justin Timberlake, Lucy Punch, and Jason Segel.
Poison ivy causes an itchy rash when a person reacts to urushiol, an oily resin found in the plant. The fruit itself is not poisonous; the danger comes from the contaminated surface.