Tallboy may refer to:
- The mix from Final Fantasy X.
- The mix from Final Fantasy X-2.
- The ability from Final Fantasy Airborne Brigade.
The Tallboy was an earthquake bomb developed by the British aeronautical engineer Barnes Wallis and deployed by the RAF in 1944. At five long tons and carried by the Avro Lancaster, it was effective against hardened structures against which prior, smaller bombs had proven ineffective.