I had this friend who's mom used to make her call her mama and said poor people call their momma's mom. I was like, WTF? That bitch was crazy though, ha, it was really funny when she lost her big old nice house on the lake and ended up in a trailer with her oldest son... dumb bitch. This thread made me think of that.
Anyway... I thought my friend callin' her mom momma was weird, thought it was a Texas thing (that's where they came from) until my friend actually told me why she calls her mom momma. I thought it was funny and used to make fun of her for it, but once I learned she was forced to do it, I was like, "Wow, yer mom is fucked in her head."