the little bus

One of those stubby school buses, usually ridden by children with physical and/or mental disabilities and those pupils who have discipline issues and other problems where they are kept away from the "normal" students.
Please see retard bus.

Jimmy has to ride the little bus because he's a retard.

short bus

Generally, the short bus is a smaller version of a regular school bus that carries mentally challenged students to school. On rare occasions, if your school board is a bunch of assholes (like mine), you will be forced to ride in a short bus for field trips if you class contains less than 18 students.

Teacher: We'll all be going on a trip to the art museum Friday!
Class: Hooray!
Teacher: And we're taking a short bus!
Class: ............
Time: Passes
Class: *is riding the short bus on the highway*
Other cars: *point and laugh*
Class: *is mortified*

Bus Stop

To relive the "Bus Stop" means to still be very annoyed or angry over a small conflict or mishap you had in the past, as if it was still occurring today.

My grandpa still hasn't spoken to me because he keeps reliving the bus stop.

Bus Factor

The Bus Factor is the number of people that could be run over by a bus before a software project would have code nobody is familiar with (or for the project to be neutralized).

Linux has a bus factor of 1.

catch the bus

To kill yourself/commit suicide.

Didn't you hear? He caught the bus last weekend...he slit his wrists.

Bus 11

When you have to walk somewhere, you're using Bus 11; your legs.

Person 1: How are you getting home from school?
Person 2: I'm catching Bus 11

bus turds

The shitty version of Bus Wanker from the us reboot of the infamous inbetweeners

*shouts and leans out of car window* Bus Turds *only the person using the joke will laugh