Anyway, Mas que nada is an expression that means
'Don't mention it', 'Don't bother' or
'Don't worry about it'.
The literal translation is 'But nothing'.
As the song says:
'Mas que nada, sai da minha frente que eu quero passar, pois o samba está animado e o que eu quero é sambar'
'Don't bother, get out of the way that I want to pass through, due to this fun samba and what I want is to sambar (dance samba)'
MAS people in Portuguese means BUT.
Hope it helps.
I AM Brazilian
© 2014 3D Divine Deadbeat Dad---Alleged - 3/11/17