You threatened to climb inside of him and build a nest - Alvin and the Chipmunks 2

Alvin and the Chipmunks 2: the squeakquel (2009) by Betty Thomas. Time stamp: ca 24 min in Alvin and Simon attacked the bullies when they teased Theodore and afterwards they see them outside the principal’s office. Alvin growls and barks at them and the principal reveals that they had threatened to build a nest inside the bullies.