rebounder
n.— «The room also has a rebounder, a small trampoline used for stimulating the lymphatic system.» —“Create sacred spaces in home” by Mary Beth Breckenridge Akron Beacon Journal (Ohio) Jan. 30, 2009. (source: Double-Tongued Dictionary)
Further reading
David from Matthews, North Carolina, grew up using the term cheese toastie for a type of grilled cheese sandwich. Cheese toasties are familiar in Ohio, Indiana, and Illinois, particularly around the cities of Decatur and Springfield. In the UK...
Matt from Grand Rapids, Michigan, was puzzled when colleagues kept saying someone had stood up at a wedding, indicating that they’d been a member of the wedding party. The expression stood up in that sense is an Americanism going back about two...