[f. as prec. + -NESS.] The quality of being babyish; childish silliness.
1835. Brighton Patriot, 21 July, 3/4. The allusion to Brighton not submitting to be placed in Schedule A, is so puerile, so childish, so twaddlish, so boobyish, that if a person were to utter such babyishness in a stable, the very horses would kick the mud which nature gave for brains out of his pumpkin skull.