The period between Christmas day 2009 and New Years day 2010 where many members of the public turned into the Master from Doctor Who.
Masteritis has spread like wildfire on many popular internet sites.
by MrsMazzyTennant January 01, 2010
1 more definition
Master bating while looking at a hot person
"Dude! I got a case of Masteritis when Alexa walked past me, she's so hot!"
by jakubszombie02 February 27, 2015