[rob the till] or [have one's hand in the till] {v. […]

[robbery] See: [HIGHWAY ROBBERY].

[robin] See: [ROUND ROBIN].

[rock] See: [HAVE ROCKS IN ONE'S HEAD], [ON THE ROCKS].

[rock and roll] See: [ROCK 'N' ROLL].

[rock hound] {n.}, {slang} A person who studies and collects rocks […]

[rock the boat] {v. phr.}, {informal} To make trouble and risk […]

[rock'n'roll] or [rock and roll] {n.} A style of popular music […]

[rock-bottom] {n.} The lowest possible point. * /The nation's morale hit […]

[rocker] See: [OFF ONE'S ROCKER].