purger

Noun

 * 1) One who, or that which, purges or cleanses.
 * 2) A cathartic medicine.

Etymology
.

Verb

 * 1)  to purge
 * 2)  to serve (a sentence)
 * 3) to bleed to remove air bubbles from a pipe containing other fluids

Etymology
.

Noun

 * 1) burgher
 * 2) a citizen of Zagreb
 * 3)  a member of the Dinamo Zagreb ultras