1. An adolescent or child, especially one who is troublesome or burdensome. There's a bunch of snotnosed kids throwing eggs at houses around the neighborhood. A: "My mom is making me bring my little brother with us to the mall." B: "Ah, geez, I don't want some snotnose kid hanging around us all day!"
2. A younger person who is inexperienced or naïve yet also arrogant, brash, or haughty. I've been working at this company for 20 years. I don't need some snotnosed kid coming in and telling me how to do my job! What makes you think you could run this company any better? You're nothing but a snotnose kid!
See also: kid
See snotnosed kid