The Collaborative International Dictionary
little go
Responsion \Re*spon"sion\ (-sh?n), n. [L. responsio. See Respond.]
The act of answering. [Obs.]
(University of Oxford) The first university examination; -- called also little go. See under Little, a.
Wiktionary
little go
n. (context UK slang universities dated English) The preliminary examination for a degree.