(rare) One who gives birth.

(slang, derogatory, US politics) To question the eligibility of a candidate for office or the location of one's birth.

plural of birther

(slang, often derogatory, US politics) A movement in the United States of America that doubts or denies that the 44th President, Barack Obama, is a natural-born U.S. citizen, thus implying that he is ineligible to be President.

plural of forced-birther

(chiefly US, Canada, politics, derogatory) One who desires that abortion be illegal, and thus that pregnant women be required to carry to term and give birth in all or most cases; a pro-lifer.

One who believes in birtherism.

Pertaining to birtherism.