boo-boo face n. a pout or pouty facial expression; moue; boo-boo lip, an out-thrust lip. Editorial Note: Probably from the facial expression children make when they have a boo-boo ‘minor injury.’ (source: Double-Tongued Dictionary)
Further reading
In 1916, a small-town newspaper in Pennsylvania printed a fanciful item about a local gathering with a guest list that included, among others, Miss Ella Vader, Mr. Ray Zor, and other punny names. This is part of a complete episode. Transcript of...
Martha from Rock Hill, South Carolina, wonders about the phrase She’s got the botts, meaning “she’s pouting.” The botts, also spelled the bots, refers to “a general malaise or moody spell,” and the bot in this case is the same bot in the botfly, a...
actually…its more of a i smell boo-boo face. you know like you just smelt crap. i.e boo-boo.