My son just has a few starter words but his favourite is "oh wow." He says it constantly and it's just adorable. Very pc most of the time until he says it dramatically, eyes open wide, when I'm getting changed and he sees me naked!
I thought it was quite adorable (and hopefully so did my friend!) when she was over yesterday with her son for a playdate and my DD decided it was time to nurse and so of course my friends DS wanted to nurse too.
My DD looked up at them just in time to see her friend latch on and she became hysterically giddy, shouting and giggling "Booby! Booby!"
My DD doesn't know many verbal words yet, but when she wants to nurse, she'll very enthusiastically sign "milk" with both hands as if she's grabbing invisible breasts. She also giggles like a maniac when she sees breasts (anyone's breasts). I believe "booby" will be a favorite word when she learns to say it.