1 Drive in the right lane and pass on the left. 2  If there are three lanes, use the right lane for lower speed driving, the left for passing. 3  If you stay in the right lane, watch for cars entering the expressway.
A scrub is a now generalized term used as a synonym for a noob or newb, which is someone who is bad at a video game or activity in general. Most of the definitions here, surprisingly, have nothing to do with the actual term.
act of scrubbing, 1620s, from scrub (v.). Meaning thing that is used in scrubbing is from 1680s. late 14c., low, stunted tree, variant of shrobbe (see shrub), perhaps influenced by a Scandinavian word (cf. Danish dialectal skrub a stunted tree, brushwood).