whippersnapper

that whippersnapper thinks he knows everything.

don't underestimate that whippersnapper; he's quite talented.

back in my day, we didn't have whippersnappers running around.

that whippersnapper is always full of energy.

he may be a whippersnapper, but he has great ideas.

she called him a whippersnapper for his bold opinions.

that whippersnapper is always challenging the status quo.

he acts like a whippersnapper, but he's actually quite wise.

everyone loves that whippersnapper for his humorous antics.

don't let that whippersnapper get under your skin.