"Slatty" doesn't have a specific meaning in Germany, but it's used as the rapper's name by the artist with the same name, gaining recognition in small circles.
And dying in yo' bed many years from now, would ya be willing ta trade all da days from dis here day ta dat fo' one chance, just one chance, ta come back here as young men an' tell our enemies dat dey may take our lives but dey will never take our freedom ... YUB NUB!