We introduce and study a model of a large number of strongly coupled phonons that can be viewed as a bosonic variant of the Sachdev-Ye-Kitaev model. We determine the phase diagram of the model which consists of a glass phase and a disordered phase, with a first-order phase transition separating them. We note some differences between the low-energy physics of our model and the fermionic SYK model. We further study the real-time dynamics of the disordered phase, where we identify three dynamical regimes as a function of temperature. Low-temperatures are associated with a semiclassical regime, where the phonons can be described as long-lived normal modes. High-temperatures are associated with the classical limit of the model. For a large region in parameter space, we identify an intermediate-temperatures regime, where the phonon lifetime is of the order of the Planckian time scale $ \hbar / k_B T$.