[sing one's praises] {v. phr.} To extol or praise continuously. * […]

[sing out of tune] See: [OUT OF TUNE].

[single] See: [EVERY SINGLE].

[single out] {v. phr.} To select or choose one from among […]

[sink] See: [HEART SINKS].

[sink in] or [soak in] {v.}, {informal} To be completely understood; […]

[sink one's teeth into] See: [GET ONE'S TEETH INTO].

[sink or swim] {v. phr.} To succeed or fail by your […]

[sinker] See: [HOOK, LINE AND SINKER].

[sit] See: [GO SIT ON A TACK], [ON THE FENCE] also […]