They point to the abject failure to reform immigration policy and say that … America has become what it never has been—an expeller of huddled masses. Gregg Krupa, Detroit News, 4 Dec. 2008
especially: a screw press for expressing vegetable oil from soybeans or other seeds
In industrial practice, after the oil is removed using mechanical means by an expeller, you have a mash that's left over. Jimmy Lovaas, Seattle Times, 10 June 2013