Aut cum scuto aut in scuto
Or maybe like me when as a dumb kid I said "that" word and one of those was stuck in my mouth for awhile!
She who ate a lot of that as a kid knows what it is...
...I'm not at all surprised.
Mom always had a bar of Lava soap handy just for those moments...... :o)
Man, I remember Lava soap. That was raspy stuff!