Married to mi best friend's granny?

[flashman]

What's the deal with the lyric: " me married to me best friend granny, she carry me go a Ochi give me fried fish and bammy"
It's pretty funny, but is that all it is? Or is there more to it. It just seems like such a random lyric yet numerous people seem to use the line, Nicodemus and Jr Reid being two examples.

[j j]

for all the men who have a thing for older women!:0

[flashman]

Or it's like bragging about being a kept man type of thing?

[Gabranth]

A fast way to get rich. Marry an old rich woman.