The nickname “shrink” for psychiatrists comes from the longer slang term “head-shrinker.” The joke compared doctors who worked on the mind to the ritual practice of shrinking human heads in certain South American cultures.

The phrase first appeared in Hollywood gossip and trade columns in the early 1950s, where it was tossed around much like “my agent.” By 1955, Time magazine was already explaining that “a shrink is a psychiatrist.”

The shortened form made its way into literature in Thomas Pynchon’s 1966 novel The Crying of Lot 49, one of the earliest recorded literary uses. Around the same time, American television helped cement the slang. Series like MASH* and The Man from U.N.C.L.E. brought “shrink” into millions of living rooms, turning it into everyday language.

By the 1970s, thanks to literature, Hollywood, and television, the term was firmly embedded in popular culture. Today, “shrink” is still a casual nickname for psychiatrists, though they rarely use it themselves.