Slomo means slow motion, like when you see a video and everything moves very slowly.
Slomo can make people think of cool action scenes or funny moments.
Examples:
The slomo video made the dog look like it was flying.
I like to watch slomo videos of people jumping.
In the slomo, the water looks like it's moving so slowly.
The slomo of the baby trying to walk is so funny!
In the slomo, the ball moves like a snail.
The slomo of the car crash is amazing to watch.