The Collaborative International Dictionary
Six-footer \Six"-foot`er\, n. One who is six feet tall. [Colloq. U.S.]
Wiktionary
n. 1 A person who is six feet tall. 2 An object that is six feet in length or height.
WordNet
n. a person who is at least six feet tall
Usage examples of "six-footer".
He was across the room, chinning with a broad-shouldered six-footer maybe thirty years old, with a slightly pushed-in nose and a vacant look to go with it.
Another undercover agent, Tex Clevenger, a lean six-footer in his late twenties who posed as McManis's messenger, was at the wheel today so Joe could run his crews from the street.
The six-footers with brownish-yellow spots on a turquoise background kill you with a single bite, in ten minutes, unless you commit suicide in the meantime to escape the intolerable pain.