英音 /ˈɡɪv.əˌweɪ/

美英 /ˈɡɪv.əˌweɪ/

1 noun [ C ] something that is given free to a customer
[ 可数名词 ]（给顾客的）赠品

2 [ noun C informal ] something that tells or shows something secret, often without intending to. A giveaway is something that makes you realize the truth about a particular person or situation.
[ 可数名词，非正式用语 ] （无意中）使真相/秘密暴露的事物

He said he’d given up smoking, but the empty packs in the bin were a dead giveaway (= clearly showed the secret truth). 他说他已经戒烟了，但是垃圾桶里的空烟盒让他彻底露了马脚。

Maki, if I am not wrong, you are Japanese, right? Yes, I am! My name is a dead giveaway haha. Maki，如果我没有弄错的话，你是日本人，对吧？是的，我是！我的名字完全暴露了我的身份哈哈。