[scheme] See: [COLOR SCHEME].

[score] See: [SETTLE A SCORE] also [WIPE OUT AN OLD SCORE], […]

[scot-free] {adj. phr.} Without punishment; completely free. * /In spite of […]

[scrape] See: [BOW AND SCRAPE].

[scratch the surface] {v. phr.} To learn or understand very little […]

[screw up one's courage] or [pluck up one's courage] {v. phr.} […]

[scrimmage] See: [LINE OF SCRIMMAGE].

[scrote] {n.} Term of abuse, from scrotum.

[search me] {informal} I don't know; how should I know? - […]

Probably the easiest & fastest way.