1.
lever, handle
A mechanical handle or arm that is pulled, pushed, or turned to operate a machine or mechanism.
2.
liver (as food)
Animal liver prepared as food, commonly chicken liver, pork liver, or beef liver. A popular ingredient in yakitori and yakiniku.
Usage
Both senses come from English but from different words: sense 1 from "lever" and sense 2 from "liver." Context usually makes the meaning clear.
Sense 2 is very common in food contexts. レバニラ炒め (stir-fried liver with garlic chives) is one of the most well-known liver dishes in Japan. Some people dislike the strong taste, and レバーが苦手 (not being good with liver) is a common expression.