1) proper noun. a former character on the action-packed series '24'. She was a CTU agent during Jack's first terrible day and was discovered as a traitor. She killed Jack's wife Teri that day. On Jack's second horrible day, he enlisted the arrested Nina's help in stopping a nuclear threat. During his third nonstop day, he got the satisfaction of killing that bitch when she tried to escape CTU custody.
2) noun. a traitor or bitch
1) Nina Myers attempted to kill Jack Bauer but failed miserably because he's too savage to die.
2) I told you my secret and you told everyone! You're such a Nina Myers.