Definition 1 of 2
Completely, in a focussed manner, all the way.
"She was full-on flirting with him, ya."
"Full-on fight, man. What a temper!"
Added 2011-08-29 by GoodCumbany
Definition 2 of 2
When something is awesome and or maybe in progress. Can reflect different emotions ranging from 'this is awesome' to 'yay! carry on'.
Added 2011-08-18 by Mildly Racist