Uppy

He says 'Oh, why not', he likes to know the reasons why, but he doesn't get uppy about it […]

Source: wiktionary

'Don't get uppy with me, son. Give me that back.'

Source: wiktionary

“I want uppy," he whined. The boat sped up my throat and I caught it in a weedy thrash of my hair. He whined and I played. More and more terrifically I played, making great splashes and bubbly creations.

Source: wiktionary

Typically she attaches other words onto pivot words, such as “want cookie,” “want Mama,” or “want uppy.” In a few months, she combines three or more words and can do so in a grammatically correct sequence, for example, “Mama go bye-bye.”

Source: wiktionary