On a Stack no Lack

this sentence is used as a extreme level of Deadass, this goes beyond just saying "on a stack" which means extremely decades, " on a Stack no lack" means your are very deadass to the point where there is no lack in your deadass.

example:
friend 1 : your girl cheated on you with me.
friend 2 : your joking ..haha
friend 1 : no am for real on a stack.
friend 2 : cant be .
friend 1 : am on a stack no lack.
friend 2 murders friend 1, no doubts.