Pacific slope1
/pəˌsɪfɪk ˈsləʊp/noun
The area of North America west of the Rocky Mountains.
Origin
Mid 19th century; earliest use found in The Penny Cyclopaedia. From Pacific + slope.
Pacific slope2
/pəˌsɪfɪk ˈsləʊp/slang (chiefly Australian and NZ ). Now historical
noun
An escape across the Pacific Ocean to avoid arrest.
Origin
Early 20th century. From Pacific + slope, with pun on Pacific slope.