1) To run really fast in a 5K
2) To roll real hard to the point where you are also bouncing.
Yo bro diggity I'm rollbouncin!
Man, I thought I was going to lose that 5K, but I really managed to rollbounce beyond my wildest dreams. In the 5K.
Dude, my bro and I rollbounced so hard last night that we ended up in Wafflehouse.
Man 1 - Yo dude were gonna roll hard tonight.
Man 2 - Nah dude. Were gonna rollbounce.
Man 1 - Fuck yea.