'A Secretary Is Not ___' (How to Succeed... song), 4 letters
A foolish thing was but ___, 4 letters
Daddy's drill is not ___, 4 letters
Just ___: Barenaked Ladies song, 4 letters
Like ___ on a string, 4 letters
Mommy's hair dryer is not ___, 4 letters
That's not ___: Mom's warning, 4 letters
That's not ___! (parent's admonishment), 4 letters
That's not ___! (parent's admonition): 2 wds., 4 letters
That's not ___! (parent's warning), 4 letters
That's not ___!: Careful!, 4 letters
The dog is not ___ (house rule), 4 letters