If in the description of a monk feature would appear a text like this:

"Each second consecutive unarmed strike you make against the same target during your turn have advantage."

What would you understand? ( Assuming four attacks per turn )

1 - Each unamerd strike after the first one have advantage.

2 - Unarmed strike, Advantage unarmed strike, Unarmed strike, Advantage unarmed strike. (What i want it to mean)

3 - Unarmed strike, Advantage unarmed strike, Unarmed strike, Unarmed strike.

3 - Other.

Other.

I’d read that so that only the 2nd unarmed strike in any series of them would have advantage.  Most people would read it as the 2nd I would assume.

Try instead “Each attack after the first that targets the same creature....”

Hahahahaha I didn't even express my self good in the question, the effect im trying to convey is the 2nd. 

I will edit the original post.