True definition of frienemy

Barish: I left you some poisonous bears on your desk.
Alice: OH It was you! Usually you wait until someone eats it before telling them it's poisonous.
Alice: They are cute though. I'd thank you if you weren't trying to kill me.
Barish: I figured I'd leave them for people I want to kill...yourself & Doug for example.
Alice: Thanks man. You're so swell.