Like (someone) was born yesterday

Translation of "like (someone) was born yesterday" into Russian

как будто (кто-то) родился вчера

He tried to trick me, but I wasn't born yesterday.

Он пытался меня обмануть, но я не вчера родился.

To think or act as if someone is very naive, inexperienced, or easily fooled, as if they are new to the world and unaware of how things work.