Kids say the darndest things. They should have some sort of TV show where they have kids saying funny things. This video might make the cut! This big brother overheard his little sister saying the "S" word. (He actually says it out loud at about 16 seconds in) What would his sister's defense be? The Giggle defense! You need to be an adorable three-year-old girl for the "giggle defense" to work. Her brother, who's not much older, thinks he's doing the righteous thing by telling mom she said the S-word. Mom's surprised, the little girl giggles... and a viral video is born. WARNING! He actually says the "S" word out loud at about 16 seconds in...so it might not be safe for work.