Used to describe the pointlessness of the word if. Similar to but better to use than "if ifs and buts were candy and nuts Christmas would be every day."
If I had some money I'd pay you that money back. Well if my aunt had balls she'd be my uncle.
A phrase used to disregard an unimportant and often times obvious detail. Used when that detail is used to divert attention from the topic at hand.
Little Girl 1: Why'd you eat my pudding?
Little Girl 2: My aunt is a doctor and she says eating too much pudding makes you fat.
Little Girl 1: And if your aunt had a penis she'd be your uncle, what's that got to do with why you ate my fucking pudding?
In Scotland this is pronounced "If ye never Had a Shuck Ye'd Droon" but to the rest of the English speaking world would be pronounced as "If You Never Had a Shuck You Would Drown!" This means that if you didn't have an Arse Crack you would drown in your own Sweat. This emplies that the Arse Crack is some sort of Drainage system for sweat to seep away and without it there would be a build up of sweat which would eventually drown the Sufferer.
Kathy: Oh Betty the sweat's lashin' out of me!
Betty: Aye...If Ye Never Had a Shuck Ye'd Droon!
An insultive phrase, denoting that you fuck somebody's mouth, that's not ever meant to be true, but it's always funny to tell it to your friends/enemies/dog/slaves/mailmen/mailwomen/pOsama Bin Laden/anybody.