A misinterpretation of the phrase "beck and call" such as "at ones beck and call" meaning to be at willful readiness to fulfill another's orders or commands. It is usually used by people who are attempting to sound more well read than are are in actuality.
"Professor Stackhouse has us at his beckon call."
"No he doesn't you jackass, he has you at his beck and call. Stop pretending to be smart"