Wiktionary
woobie
n. 1 (context US baby talk English) Any object, typically a blanket, garment or stuffed animal that is used simply for its comforting characteristics. 2 (context US intimate English) A term of endearment. 3 (context fandom English) A fictional character, usually physically attractive, who is put under constant stress and angst so as to create emotional attachment. 4 (context US military slang English) A poncho liner.