Wipe it off and say sorry.
(My uncle told me this joke when I was five. I didn't get it at the time, and he knew I'd get it someday. That makes it kind of funnier. One day when I was like 14, I suddenly remembered that joke and went, "Oh! Now I get it!" and laughed my ass off.)
Many of the jokes are contributions from our users. If you find anything offensive and against our policy please report it here with a link to the page. We will do everything to make this an enjoyable platform for everyone.