Lightlightyear – the amount of time it takes light to travel one lightyear.
Gigabitbit – 128 megabits per second. Somehow still hundreds of times better than 4G LTE.
Spoonempty – the amount of liquid in an empty teaspoon.
Millibit – 0.000122070312 bytes. Useful only in measuring my internet speed.
Terrainbyte – 80MB, the amount of memory allocated per second by my one-slot Minecraft server.
CS-Instant – approximately 92.7 seconds, the time it takes to post a topic on a Community Server forum.