Wiktionary
to the tonsils
adv. (context figuratively idiomatic informal postpositive English) Entirely, completely, extremely, to the greatest degree. alt. (context figuratively idiomatic informal postpositive English) Entirely, completely, extremely, to the greatest degree.
Usage examples of "to the tonsils".
Already his manner was that of a man whom the society of Bertram Wooster had fed to the tonsils, and one more sight of the latter at his elbow might quite easily make him decide to take prompt steps through the proper channels.
Over the years he set fractures, relocated joints, diagnosed and treated venereal diseases, and dosed infections from the kidneys to the tonsils.