I hung up before he could concoct some other scheme.
If you like to cook you can even get creative and concoct your own series of Atkins recipes and meal plans!
If parents say nothing, or concoct a cover story, it can be impossible to mount a prosecution.
Or concoct wildly utopian lessons or plenaries for all occasions.
You can concoct a toddy using whiskey, brandy, rum, or bourbon, making the toddy a great party drink because you can make one to each guests tastes.