Lucky Charm is a man cumming on a tooth brush, and his "partner" will brush their teeth with it and not be able to brush their teeth again after few hours or so. Hopefully the man's cum makes you feel "lucky" if it does, you just got Lucky Charmed!
A boner, but in a pedoy way.
Something a pedo gets when they see kiddies and they have to describe to the kids why there's something sticking up between their legs.
(On adults lap at the helter skelter)
Little Jimmy: "What's that I can feel under my legs?"
Pedo Kristian: "Oh that's just my lucky charm little one."
Singular noun-Derogatory reference to Irish people from Ireland or anyone with big ears, unruly eyebrows, bad teeth and may include excessive ear hair. Plural - Lucky Charms