Here [1] are some ideas on the origin and usage. [1] - https://english.stackexchange.com/questions/51593/where-does-the-phrase-dead-simple-originate https://en

Here [1] are some ideas on the origin and usage. [1] - https://english.stackexchange.com/questions/51593/where-does-the-phrase-dead-simple-originate https://english.stackexchange.com/questions/51593/where-does...