?:《informal》 of bad quality ☆The weather is still pretty crummy. 天気はまだ全く良くなってない。
?:《informal》bad or not pleasant ☆Larry came home in a pretty crummy mood today. 今日、ラリーはとても不機嫌な様子で帰ってきた。
?:《spoken》used to show that you are angry or annoyed, or to emphasize what you're saying ☆I didn't want your crummy toy anyway! (Longman) あんたのおもちゃなんかどうせ、欲しくなかったもん!