Swahili (African dialect) for friend. Used as the name of an unusual baboon in the Disney film, Lion King.

You stick ur two fingers in your own ass and then whipe it on the forehead of your partner and say "Simba" in a way similar to the scene at the beginning of lion king where rafiki whipes the fruit on simbas forehead before exposing him to the kingdom.

After having sex the male takes some of the cum and smears it across the partners forehead.

When a male wipes his cum on the girls forehead with his thumb and whispers the name "simba"

When you squeeze out the last bit of you ejaculant onto your thumb and spread it across your partners four head while saying "simba".