Tobogganing

As someone who comes from a tropical country. I have never known about a toboggan.

Anyway, here is the definition:
to·bog·gan (t-bgn)

n.

A long, narrow, runnerless sled constructed of thin boards curled upward at the front end.

intr.v. 

to·bog·ganed, to·bog·gan·ing, to·bog·gans

1. To coast, ride, or travel on a toboggan.

2. Slang To decline or fall rapidly: His good fortune has tobogganed.

And this is the trigger why I searched up this word: 

I know I am tobogganing in your mind.