What does this Shanghainese dialect mean?

Take a hard clay: you silly son (or a fool will do).

Minus two and three: it means no three, no four.

Ha 354: It's nonsense, it's nonsense.

Five to six: it means no brain, losing three and pulling four.

Ha, ha, ha: It's just a mess.

Wrong gas, wrong gas: you hate it, hate it the most!