What does Ima Firin Mah Lazahs mean?

The term "Ima Firin mah lazahs!", is an internet meme.You take an image and draw on a mouth and eyebrows with red. The mouth is filled with black. The eyes are white, and black. Then you add a laser coming out of its mouth. Finally, add the text "Ima Firin Mah Lazahs!".
If you are refering to the black head that yells "IM A FIRING ME LAZAAR!" then to be honest all I know is that it is named Shoop da WHoop and came up out of nowhere. i dont think anyone one knows who did the first one only that now it has been done many times by many people
Shoop da whoop orginated from 4 chan, in which a user managed to sucsessfully cross two dragonball characters, cell (perfect form) and mr popo( whos face still appears all the time whitin the meme)
it means....IMA FIRIN MUH LAZOR BLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH