A popular ship from the TV series Doctor Who, involving The Master and The Doctor. This ship name can be used to refer to any era in their existences, but mainly refers to the academy era , or when they were kids and went by the name Koschei Oakdown and Theta Sigma
by tardismylife July 10, 2015
"Big Thoschei energy" - When your best friend constantly tries to kill you but is still kinda hot and you are totally in love/denial.
My best friend Koschei tried to murder me today and take over the universe, I'm kinda into him and have rings with our names, I hate him. We have Big Thoschei Energy.
by Missy Saxon January 16, 2020