swotty
(ˈswɒtɪ) adj,
-tier or -tiestinformal Brit given to studying hard, esp to the exclusion of other activities
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014