BELFRY, RACKING AROUND IN (ONE'S)

(slang) going around in (one's) head. A variation of the phrase racking one's brains, trying very hard to remember or think of something, and belfry, a tower for bells, usually attached to a church or other building. —OEC - Organization and Ethics App Mar 91

(slang) going around in (one's) head. A variation of the phrase racking one's brains, trying very hard to remember or think of something, and belfry, a tower for bells, usually attached to a church or other building. And that datum kept racking around in my belfry, round and around.