He shifted his bulk a little in the chair.

The snake shifted its bulk slightly, almost as if it were laughing.

Perlmutter shifted his bulk into a more comfortable position before continuing.

Pyros shifted his great bulk into a more comfortable position.

He shook his head, shifting his bulk to look out the window.

Razor was merely shifting his bulk to obtain a more comfortable position.

Big F shifted his bulk along with the direction of the conversation.

He shifted his bulk slightly, as if into a more comfortable position.

He shifted his large bulk in the lawn chair.

Paul shifted his bulk cautiously on the small chair.