Slide Smash

From SmashWiki, the Super Smash Bros. wiki

Slide Smashing, also known as Smash Dashing or Hyphen Smashing is a simple, but useful technique. To do it, simply dash and use an Up smash; your character will slide to a stop while performing their Up-Smash. All characters can Slide Smash.

[edit] Application

The most obvious use for the Slide Smash is as an alternative to using the character's dash attack, which is generally mediocre to weak in terms of power; many dash attacks also leave your character vulnerable where as the Slide Smash is generally difficult to punish. Another use is simply as a set-up to an Up-Smash, which can be used to combo or to kill. Finally, for fast characters such as Sonic, Captain Falcon and Snake a Slide Smash covers incredible distance, which is useful for approach.