  Oscillons are long-lived, localized, oscillating nonlinear excitations of a
real scalar field which can be abundantly produced during preheating after
inflation. We give the first $(3+1)$-dimensional simulation for the oscillon
formation during preheating with noncanonical kinetic terms, e.g. the
Dirac-Born-Infeld form, and find that the formation of oscillons are
significantly suppressed by the noncanonical effect.
