Student or Learner
I heard this conversation on the television:
A: I am sorry to tell you that for personal reasons, I will not be able to attend the farewell lunch.
B: This lunch is for you.
A: I am not up for it. I want to leave quietly.
What does "not up for it" means?
"Be up for" indicates a sense of willingness to do or interest in doing something, so probably a synonym would be "be interested in".