"Unbridled energy" refers to having a high level of enthusiasm, excitement, or vigor that is not controlled or restrained. It implies a burst of limitless or unrestricted energy. Full definition
Parenthood seems to be a different experience for everyone and for us, having two kids has been way harder than one, especially boys brimming with unbridled energy who run around all day, fight back mentally and physically and make the messiest messes you've ever seen. (stylewich.com)
While activism and advocacy are great services to society, not everybody has the time, personality, or unbridled energy for headline - making moves. (smallbites.andybellatti.com)
The leaves, rendered in controlled yet wildly exuberant green slashes of paint, are seemingly being tossed about by an unseen wind and create a sense of unbridled energy reminiscent of Chaim Soutine's Ceret landscapes. (hamptonsarthub.com)