Meaning: Shit! Damn! Motha Fucker!
A popluar guy on youtube named Africano Boi made this video to show the "trials and tribulations we humans experience in our everyday lives.When all you can think of is SHIT DAMN MUTHAFUCKER !"
(I suggest watching the video)
Boi: "I have just cleaned the WHOLE house. Im so proud of myself!!"
*looks around and the house is dirty*
Boi: "S! D! MF!"