Sentence:  Woe betide him if he drinks with the toe pointed upward, for as the boot is tilted, a pocket forms at the axis of the ankle and the entire <WSD>toeful</WSD> of beer suddenly breaks through the pocket, gushing into the face of the unsuspecting imbiber! 
Meaning of the word marked with <WSD> tags:  The amount that fills a toe (of a sock, boot, etc.)