# Hitchhiker's thumb

> condition in which the thumbs can bend backwards 90°

**Wikidata**: [Q25554753](https://www.wikidata.org/wiki/Q25554753)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hitchhiker's_thumb)  
**Source**: https://4ort.xyz/entity/hitchhiker-s-thumb