Analogous to phrases such as “What the fuck” or “What the hell”. Often used in the context of describing something utterly confounding or inexplicitly stupid. Can be abbreviated to “What the dil” if children or those easily offended are present.
Sam: Whats up bro?
John: Nothing much, expect I'm building a rocketship to Mars so we can play ping pong in zero gravity!!
Sam: What the dildo??
by Master2117 July 12, 2007
Get the what the dildo mug.
It is similar to the phrase- What the Fuck?

or to something that one might not have understood
MORE DETAIL:

the word dildo is used for the simple fact that you use a dildo while fucking
Friend-Dude i just shit my pants! Help!!

You- What da Dildo? No!! Ew!!
by PARYSS :) May 27, 2010
Get the What da Dildo? mug.