A phrase popularised by the Angry Video Game Nerd. Often used in reviews to point out a really shitty feature/scene/piece of shit.

Can also be used to show one's dissatisfaction with something.
Mike: There are aliens in the fourth Indiana Jones.
Jim: What were they thinking?!
by Nitemarish September 6, 2009
Get the What were they thinking? mug.
Term that people use when someone younger does something random, stupid, or uncalled for.
by sumguy91 July 31, 2012
Get the Child What Were You Thinking mug.