My family uses the "knee high to a grasshopper" phrase as well-
others I've heard so far from my family...
"Boy I'll beat the black offa ya and we'll have another Michael Jackson in the house!"
-my granny is still pissed about the Michael situation
"Don't make me get ugly in here"-this is usually said first thing in the morning when the person that said it is looking his/her ugliest
"Looks like you beat me to it"-we all said this under our breath
"Keep that wooden nickel in yo pocket"
Still thinking of more....
------------------
"Mind ya own, stay true to ya own, be ya own."
Peace and God Bless
Classy_Diva5