Sentence:  I used to think she was such a <WSD>suck</WSD>! She'd cry when I took to the ice, whether I skated well or badly. She'd cry when I left the house. 
Meaning of the word marked with <WSD> tags:  A weak, self-pitying person; a person who refuses to go along with others, especially out of spite; a crybaby or sore loser.