. "on-and-off relationship" . . "on-again, off-again relationship" . . "Sam Malone and Diane Chambers" . . "Sam Malone" . . . . . . "has an on-and-off relationship with bartender Sam Malone" . "on-off relationship" . "Sam-Diane relationship" . . "Sam and Diane" . . . "Diane Chambers" . "Sam and Diane" .