mixed up expressions

On one of my Wednesday afternoons at home while working on some schoolwork, Evangelina loudly objected, "I don't underknow this!"

Her combining words from "I don't understand this!" & "I don't know this!" reminds of what she often said 1-2years ago: "bight next to," as in "That toy was bight next to you."  It's a combination of "right next to" & "by."  

Our funny girl...