Da Goyim Know
"Da Goyim Know" is an antisemitic catchphrase used to say that non-Jews have "figured out" an alleged Jewish conspiracy or plot, which therefore needs to be "shut down." Goyim is a pejorative term for non-Jews, used, in this case, by non-Jews themselves. It is most often associated with the alt right segment of the white supremacist movement, and message boards such as 4chan and 8chan. Antisemites use this phrase when pointing out alleged Jewish misdeeds.