to make something more powerful or more attractive by making changes to it, especially when it is old:

]]>https://definedictionarymeaning.com/topic/289817/souping-them-upRSS for NodeMon, 15 Jun 2026 22:25:14 GMTWed, 08 Mar 2023 02:26:12 GMT60to make mechanical changes to something, esp. a vehicle, in order to make it unusually powerful:

]]>https://definedictionarymeaning.com/post/487125https://definedictionarymeaning.com/post/487125Wed, 08 Mar 2023 02:26:13 GMT