surf's up

== English == === Etymology === Originally used in surfing to say there are good waves for surfing and one should get ready to ride them. This likely resulted in the later idiomatic use: to get ready for something. === Pronunciation === === Phrase === surf's up A phrase used in surfing when a nearby wave is passing. (idiomatic) It's time (to do something). === References === “surf's up”, in OneLook Dictionary Search.