Other people call it "ice block sledding
" -- which is what it really is.
the name because A) no one knew what we were talking about, and B) it sounded cooler
A large group of kids would each buy a big block of ice
, take it to a closed park or golf course
at night, put a towel on their block, sit down and hang on. Much fun, but prepare to get wet, bruised, and have a cold ass
. It also helps to be under the age of 14