What does "let off" mean in this sentence?
- I wasn't sure I'd see you after your freak-out at the investment party...
- Freak-out? I let you off easy.
- One minute I'm under the impression we might actually have a future together,
and the next I catch you lip-locked with Nolan Ross

Question

Answer

http://dictionary.cambridge.org/dictionary/learner-english/let-sb-off

Answer

The conversation doesn't make sense to me. Who is talking?

Answer

It means to not give someone the punishment they deserve from you or another.  
A related phrase is "let somebody off the hook."  The analogy there is to a fisherman, who has caught a fish, but instead of eating it, he lets it back into the water.

Letting someone off the hook, then, is like that fisherman.  He has some power to punish or harm a person as a result of their actions, but he can "let them off the hook" and pretend it never happened.

لا تفوّت فرصة تعلّم لغة جديدة وأنت مرتاح في منزلك. تصفّح مجموعتنا المختارة من مدرّسي اللغات ذوي الخبرة وسجّل في درسك الأول الآن!