Bite the lemon!
Perhaps it is a similar concept of embrace the suck!.
This latter military expression means that, when facing a bad experience, you must embrace it to overcome it.
Not biting the lemon, not embracing the suck, or escaping from a difficult situation karma imposed upon us will surely bring us back to the problem, amplified many times over.
Or maybe it's just a suggestion to overcome the senses or a way to express love to whatever offer is given by devotees, or maybe a way to share your feelings (being a lemon), or perhaps a way to say how you have to eat out your negative feeling.
It's interesting that there are so many interpretations of that simple gesture.
Thanks for all your insights which I did not think of at all! Yes often Amma’s guidance and lessons had different significance to me. As an example when I went to her ashram in Northern California (San Ramon) to see her when she was visiting and her attendants at the huge parking area would not let me in with my van. I asked why and they looked at it and implied it used too much gas for having only one passenger. Getting the lesson quickly (this time) … I became a taxi for people at the hotel miles away who were seeking rides to the event. I slept and lived in my van on and off while living in California.