A common exclamation used as a substitute for Holy Shit to describe an exiting, ridiculous or unbelievable event. It's a very popular amongst those who avoid cursing. It's similar to other curse word substitutes like Holy Cow or Holy Schnikes .
Holy Canoli did you see that one-handed touchdowncatch to win the game?
An exclamation, when your numptycousin john's kids are around and he doesn't want you swearing in front of them, but you just stubbed your toe so flipping hard and you gotta react in some way, but little timmy is two feet away and john is looking right at you so you have to say them that gets as close to the satisfaction of yelling "FUCK" really loudly after stubbing your toe but- ... what was i talking about?
slip of the tongue perhaps,
Those idiots who drive around in a ridiculously raised pick up truck, making a top heavy vehicle even more top heavy and unstable
A:*gah*
B: "Whats the matter"
A: This dam prickup is blinding me.
B: Stupid thing's, as if there lights weren't blinding enough as it is.