foamer

1. (US, derogatory, slang, sometimes)A railfan, particularly an obsessive one.

2. A railfan, particularly an obsessive one.

   (US, derogatory, slang, sometimes)Someone with a special interest in a particular topic, usually obsessive.

3. A device that foams or froths liquid.

4. A device that foams or froths liquid.

   A screw-top culinary device that comprises a pressure vessel used to hold a liquid and is charged with a compressed gas, to force the contents out of the nozzle, to create a foam.

regular