Rolling on the lawn bowling. Like in a bowling alley, but while rolling on the lawn. For those of us who don't know what the fuck is going on and find it funny.
Brett: hey man have you rotund ever bleat squirrel tail with ketchup? Dumptruck.
Bob: hold up, I'm ROLB.
In football, Right Outside Linebacker
Brad Jones is a Right Outside Linebacker (ROLB)