Bye bye.

Jude is up to 15 or so words in his vocabulary.  I think that approximately 20% of these words would be understood by someone who he doesn't call "mama," so we're not talking about clear sentences here.  Jude's words up to this point include:

Heyer's Dictionary, Volume I

Ba = ball
Bo = boat
Da = dog
Doo = two
Dow = down
Ohp = help
Mo = more
Mama = Mama/Mommy
Ma = Grandma
Pa = Grandpa
Tee = tree
Doh = door
Ow = Out
Hi = hi (clearly one of the 20% that is comprehensible)
Ah dah = all done
Dahktah = doctor
Bobo = bubble
Kee = kitty (and oldie but a goodie with Jude)
No = no (20%, but in case it isn't clear, Jude emphatically shakes his head when saying this word over and over and continuing to do what you told him not to in the first place.)
Ee = eat

But the word that has gotten the most play in Jude's vocabulary is "bye bye."  Let me tell you, bye bye is as multi-purposes as Windex according to Jude.

Don't want to be in the car seat any more?  Just tell it bye bye! Going to bed?  Why learn to say good night when bye bye works fine?! All done brushing your teeth?  YELL bye bye many many many times.  Don't want to eat the meat on your plate?  Just say bye bye and feed it to the dog.

Of course, he is my child.  He says his favorite phrase all day and night, over and over again, with changing inflections.  But when we are face-timing with my parents on our iPhones tonight and I say "Jude, say 'bye' to Grandma!" he waves and says nothing.  And better yet, he looks at me like "What in the hell do you want me to do?"  Stubbornness runs in the family.