To negotiate with someone with the intention of screwing them over, usually by denying the deal was ever made once you have what you wanted. Combination of nig and negotiate.

When some little bitchboy is acting like a little tiny pee pee poo poo baby and messing up the group plans.

The common African American tradition of yelling as loudly and nonsensically as possible in order to settle a dispute. The winner usually either yells the loudest, swears the most, or is the one with the gun.