Sentence:  With a new EO to train and supervise, his workload was bound to increase, so he put in for overtime and spent his Sundays in the office, alone and undisturbed, so he could <WSD>gen up</WSD> on League Cup winners and current affairs. 
Meaning of the word marked with <WSD> tags:  To study in detail; to familiarize oneself with all available information.