My son calls nursing "Ta-tash". He says "tata" for please when he wants something, and he started out calling nursing "sssss" for nurssssssssss, and that kind of evolved into "shhhhhhh" for nurse. Put them together : "tata shhhhhhh" and it becomes a new word: "tatash".
Our whole family now uses tatash as our codeword for nursing. Screaming kid in a store: "Uh oh, someone needs her tatash."
DS will hear a baby crying in a store or somewhere and say "Baby sad. Baby wah wah wah. Baby need tatash."
the actual STUFF (the milk) is now called "Mama Milk"
He has named my breasts: lefty is 'Sip', and righty is 'Switch'. I used to ask him if he'd like a 'sip of mama milk', and when we'd change sides I'd say "switch!".