"Unbridled enthusiasm" refers to an intense and unrestrained level of excitement, energy, or passion about something without any limitations or restrictions. Full definition
And as you'll see, especially given everything I've been saying about the shrinking legal profession and the steep decline in law firms» interest in associates, my response wasn't filled with unbridled enthusiasm for the prospect. (law21.ca)
Soon after VOS PERFORMANCE launched their bespoke conversion for the Lamborghini Huracán in 2015, the press around the world responded with unbridled enthusiasm: (lambocars.com)
Limited in scope though it may be, the data has inspired unbridled enthusiasm from Sacca. (inc.com)