Noun
the skin of a banana (especially when it is stripped off and discarded)
Source: WordNetWithout hurting anybody, we all tend to laugh at others' discomfort. When someone slips on a banana skin and falls it's funny. Shahrukh Khan
I was more qualified than most of the guys I was working with, which they hated. I'd come into work and there'd be a banana skin stuck to my overalls or a picture of a monkey on my coat. Gina Yashere
he slipped on a banana skin and almost fell Source: Internet