from Wiktionary, Creative Commons Attribution/Share-Alike License.
Agent nounof master: one who masters.
from Wiktionary, Creative Commons Attribution/Share-Alike License
God-damn that Herbie Hancock is a masterer--you know what I mean?
"Well," said George, falling back upon his favourite expression in his amazement, as he drew his nightcapped head from the hole, "if that ain't a master one, I niver saw a masterer, that's all.
"You never saw a masterer, that's what you were going to say, wasn't it?