This word is a Super Smash Bros. term meaning to save your teammate with a Falcon Punch (Normal or Reverse), sacrificing yourself to save them in a match.
Marth: "help me i just got rested at 0%, extreme knockback...agh"

Falcon: "...i got you (runs across the field, short-hopping to a falcon punch) FALCON PAWWWNCHH..."

Marth: "Thank you home dog...that was awesome you FALCON-SIDER, YOU"

Falcon: "Yes! yes it was...now come on! and let's beat them (meaning the opposing force)

Opposing Force (two Bowsers): "...show us your moves..."
--------------------------------------------------------------------

SILENCE........TIPPER TO KNEE!!!!!!!!!! YESSSSS
by PhantomMarth February 5, 2010
Get the Falcon-Sider mug.