/'dɒtɪ; `dɑtɪ/
adj (-ier, -iest) (infml 口 esp Brit)
1 foolish; silly; eccentric 傻的; 蠢的; 古怪的
*She was getting a bit dotty and could never be left alone. 她越来越见傻, 决不可无人照看.
* Not another of your dotty ideas for making money! 你不要再出那些赚钱的馊主意了!
2 [pred 作表语] ~ about sb/sth very fond of or enthusiastic about sb/sth 非常喜爱某人[某事物]; 对某人[某事物]极感兴趣
*She's dotty about this latest boyfriend. 她非常喜欢这个新交的男朋友.

adj old-fashioned informal
[Date: 1800-1900; Language: Scottish English;Origin: dottle 'stupid person', from dote 'to be stupid' (12-19 centuries)]
slightly crazy
dotty about sb/sth
liking or loving someone or something very much
　Gemma's dotty about horses.