I don't know if that's the right way to spell it, but babbafay is the most common word in A's nonsense language, which is called "A Language."
I asked her what it meant today and she told me that it means I Love You or Potty Monster depending on the day. Another popular word is guavafay but she has never revealed the meaning of that.
I thought she would enjoy hearing a poem with a lot of nonsense in it so I started quoting Carroll's "The Jabberwocky" to her--Twas brillig and the slithy toves did gyre and gimble in the wabe--you know all that. A told me that she thought it would be a nonsense poem and that she understood too many words.
As she ate dinner with Z tonight I heard her saying: Z, if you ever want to tell your boyfriend that you love him --
Z: I don't want to have a boyfriend --
A: Your boy that is a friend, then, and you want to tell him that you love him, you can just say babbafay. You can tell him what babbafay means and then when you want to say I love you then you can say babbafay and then no one will know that you said I love you --
Me: Hey. Be careful, you might accidentally call him a potty monster.
A: HA HA HA!
Me: Now eat your dinner.