A subgenre of indie rock used to describe artists whole songs are exceeding sweet and/or emotional. These groups are often denoted as twee, but more specifically the songs evoke feelings of fuzziness, teddy bears, and warm glasses of milk before bed.
Hey broseph, did you catch Belle & Sebastian last night? I'm glad I brought my childhood blanket, those guys are so effing cuddle core!!!1
Originally used to jokingly describe the sound of Vancouver, BC punk band cub (sic) and coined by friend Nicolas Bragg. It was meant to be an antithesis to the crotch-rock/clit-rock/riot grrrl/foxcore bands of the early-mid 1990's such as L7, Hole, Bratmobile, The Muffs, et al. Incorrectly used to describe the sound and fashions of other bands.
"Cuddlecor '94" as per the liner notes on their "Come Out, Come Out" album.