Me and my friends made this word up. It means you're really excited about something, you're shocked, or you're like really hyper. A lot of people use it now. It's such a great word.
Excited: FUCKLE OMG FUCK FUCK FUCK ITS MY BIRTHDAY TODAY WOOOOOOOOOO!!!!!!!!!! fuuuuuck!!!! ffffuuuccckklllee!!!!!!
Shocked: WTF :O Fuck!! FUCKLE!!
Hyper: HAHAHA THIS IS SO FUCKING COOL FUCKLE FUCK FUCK FUCK WOOOOO FUCK YEAH BABE I LOVE THIS WOO IM HAVIN SO MUCH FUN FUUUUUUUUCKLE FUCKLE FUCKS FUCK FUCKLE
so this is what fuckle means. feel free to use this word and don't abuse it. thanks everyone. wooo. from nicole and courtney. <3