[slip of the tongue] also [slip of the lip] {n. phr.} […]

[slipup] {n.} A mistake. * /"I'm sorry, sir. That was an […]

[slow burn] {n.}, {informal} A slowly increasing feeling of anger. * […]

[slowdown] {n.} A period of lesser activity, usually in the economic […]

[small] or [wee hours] {n. phr.} The very early hours of […]

[small fry] {n.} 1. Young children. * /In the park, a […]

[small talk] {n. phr.} General idle conversation. * /At the party […]

[smash hit] {n.}, {informal} A very successful play, movie or opera. […]

[smoke screen] {n. phr.} A camouflage; a veil; something used to […]

[smoke-out] {n.} A successful conclusion of an act of investigative journalism […]