[red-light district] {n. phr.} A district of brothels or where prostitutes […]

[redcap] {n.} A porter at an airport or at a railroad […]

[reel off] See: [RATTLE OFF].

[reference] See: [IN REFERENCE TO] or [WITH REFERENCE TO].

[refine on] or [refine upon] {v.} 1. To make better; improve. […]

[refl] Deliberate mistype of "[ROFL]"

[regain one's feet] {v. phr.} To get back up again after […]

[regard] See: [IN REFERENCE TO] or [IN REGARD TO] or [WITH […]

[regular guy] or [regular fellow] {n.}, {informal} A friendly person who […]

[rein] See: [FREE REIN], [GIVE REIN TO] or [GIVE FREE REIN […]