reckon without (one's) host(redirected from reckon without his host)
reckon without (one's) host
To plan without taking into account all the necessary or important factors or people. It was originally used to describe one who did not consult one's host, such as an innkeeper, when calculating one's lodging expenses. A: "You made plans for Mother's Day without even asking your mom what she wants to do?" B: "I know, I really reckoned without my host on that one."