(名詞) 隨時待命或隨叫隨到的 (on call) 醫生，尤指代替其他醫生看診來謀生的醫生。亦寫成 oncallogist。
So this is the tale of the "on-call-ogist",
Who met Richard for the very first time,
Tomorrow the 'real guy' should be in,
And he can clarify.
—Sonja, "The Tale of the Crazy 'On-Call-gist'," A Day in the Life of AJ and Dexter, August 22, 2010
For surgeons such as Dr. Rabinovich, it means cobbling together a job by filling in for others in what is jokingly referred to as the burgeoning new specialty: the on-call-ogist.
—Lisa Priest, "Canadian surgeons face flat-lining job market." The Globe and Mail, February 24, 2011