1. Double cross
-Joan Garcia double crossed the Nazis and fed intelligence to the Allies.
-Petyr Baelish double crossed Ned Stark in the first book.
-He double crossed me and put the patent under his name.
Definition: to betray someone
Etymology: the term's earlier sense in sports gambling, where it alluded to the duplicity of a contestant who breaks his word after illicitly promising to lose
2. High noon
-The Roman civilization reached its high noon under Ceaser.
-M Night Shyamalan reached his high noon directing "THe 6th Sense" his movies have been terrible since then.
-Some argue that the TV series Modern Family has past its high noon.
Definition: The highest or most advanced stage or period:
Etymology: as in exactly 12 noon
3. Hit the ground running
-When Joel was younger he would be able to hit the ground running.
-Alan's venture was able to hit the ground running thanks to his ad campaign.
-The President hit the ground running by enacting laws to improve education.
Definition: to start the day very energetically
Etymology: It may come from troops dropped into a combat zone, from stowaways jumping off a freight train as it nears the station, or from Pony Express riders avoiding delay when they changed mounts.