1. A yellow bus-like vehicle that takes kids to school. They are often driven by incompetent drivers (usually old people or immigrants). They are also cramped and uncomfortable for older students, as school districts tend to use the same buses for high school as the ones they use for the kindergarten.
2. A term for any boxy, large, or cumbersome vehicle in a video game
1. Angry mom: Get your rear out of bed or you'll miss the school bus!