Hellaheck
When you are in the middle of swearing when you realize there is a little kid sitting right there so you turn it into its non- swear equivalent. Can also be "Shitapoo", "Assabutt", and any other you can think of.
Ow! Ah, Shit..apoo." "Dude, there's little kids here!" "I know! That's why I turned it into a hellaheck!