No, your heart does not stop when you sneeze. A sneeze begins with a tickling sensation in the nerve endings that sends a message to your brain that it needs to rid itself of something irritating the lining of your nose. You first take a deep breath and hold it, which tightens your chest muscles.
Definition of lump. 1  transitive verb. 2  1 : to group indiscriminately. 3  2 : to make into lumps; also : to make lumps on or in. 4  3 : to move noisily and clumsily. 5  intransitive verb. 6  1 : to become formed into lumps. 7  2 : to move oneself noisily and clumsily.
A mixture in which very small particles of one substance are distributed evenly throughout another substance. The particles are generally larger than those in a solution, and smaller than those in a suspension. Paints, milk, and fog are examples of colloids. Compare solution, suspension.