LOL… No, that isn’t exactly how you use it. The expression is used more when someone tries to do something dishonest or kick below the belt because they couldn’t win/achieve something the normal way.
Examples would be:
1) You lose a race, and accuse someone of cheating without proof.
2) You show up for work for 2 hrs out of 8, and when you don’t get a promotion you claim you were discriminated against
3) You borrow a lot of money, and then when you can’t pay it back, you claim the banks cheated you.
4) You lose an election, and you demand a recount after recount after recount…And then even if the results still don’t come in your favor, you claim there was voter “irregularity”
But to further correct your grammar, “ni” refers to you…You would say “ta” as a third person reference to him/her.
