I'm posting this tentatively and without getting my hopes up. I do this for two reasons: firstly, because for all I know, my subject could be common knowledge that's been around since the dawn of Smash and I've just passed over it like a scrub; secondly, because my subject seems so simple, I'm finding it really hard to believe that I'm the first one to find it, so I'll give due credit to the true discoverer (Discoveree?) should they reveal theirself.
Until then, I'm just calling this "Egg Dashing." I'll post a video when I can, but doing that from my phone is an ordeal I just don't want to endeavor right now.
This is a super easy technique to execute: all you need to do is dash, then short-hop and quickly follow it with an Egg Toss. To do this properly, I simply use the "Y" button for the short-hop ("X" is my normal jump button) and then roll my thumb to "B." When done right, Yoshi should toss an egg while sliding slightly forward.
While this isn't super impressive, I was really excited to share what I may have discovered. Yoshi seems to be one of the few characters with more of a selection of movement options. I'm really just hoping this my open some doors to other possibilities, so keep developing this character into all he can be! I'm looking forward to growth of the metagame as we continue down the road.
Y'ALL HAVE A GOOD ONE