The Simba is done by completing the following steps:
1. Guy cums on girls face (must get some on forehead...it is essential)
2. Guy reaches out and smears the cum across said girls forehead while saying SIIIIIIMMMMMMBBBBBAAAAAA in a long, drawn out manner.
As you can easily tell this is a favorite of many, many girls...especially those girls known as cum sluts, chicken heads, etc.
(Bonus points if you dress in a Rafiki costume while doing this.)
Kim and George were having sex in the bathroom stall when George thought it would be funny to pull the Simba.