Mike is correct about your second sentence.The sentence 'here goes nothing' doesn't mean much of anything when you look at it literally, word by word. But as an expression it means "I'm taking a chance, let's see what happens" - "I'm just going to go ahead and take the risk" - "I'm making the jump, hope my parachute opens, here goes for nothing!"

Hi Mike, You are correct about the casino, I have heard people say this as they throw the dice, as they are risking their money on one bet.

Jura, I think we can use "here goes nothing" when we wanted to make bet in casino and then understood that we would not win.

Hello Elmer, It doesn't make sense means it is not reasonable ,logical or comprehensible. * How come he says he arrived yesterday while the date on his ticket is today's ? It doesn't make sense ?!? Here goes for nothing means taking the risk to do something without really being sure of the consequences .

'Here goes nothing' means 'I am going to begin, but I think I will not succeed, or I think it will be very difficult to accomplish'.