Jen: "My dog keeps eating my homework!"
Nick: "Calmly explain the situation to her."
Jen: "No, she'll never believe that! Ugh I hate my dog!"
Nick: "Kill it."
1. To masturbate, jack off, stroke it, usually used in context to not let the opposite sex know what you mean.
(kill)
2. To fantasize about someone while masturbating.
A term friends use between eachother to let there friends know when they have a girl they're trying to get with and don't want the girl to know that they know that they are going to have sex with them.
Hym "Oh, shit, no! I don't know how to kill it! I was lying blatantly because I thought it would get you to hurry up and save me faster! Ha! That isn't a thing! Hahahahaha! Why? Did it tell you the riddle? What did it say?"