Tickled 除了大家都知道的“被弄得发痒或者咯咯笑”的意思外，也有“给逗得高兴”的意思。Tickled pink的意思就是：Very pleased; delighted 感到万分高兴。
例句：I'm tickled pink to hear that Bob's asked Susan to marry him. They're both my good friends and I've always thought they were made for each other. I know they'll be very happy together.
听到Bob向Susan求婚的消息我感到万分高兴。他俩都是我的好朋友，而且我一向觉得他们是天生的一对。我知道他们在一起会非常美满。