Flush
The term flush or flushing may refer to:

 Flush (cards), a playing card hand where all cards in a bet are of the same suit
 Straight flush, a playing card hand where all cards in a bet are both of the same suit, and in sequential order
 Flush (physiology), a condition where one experiences a brightening of the color to their face or skin
 Flush (tactic), a means of forcing something hidden out into the open to be found
 Flush (waste removal), the act of removing a substance, such as in rinsing, from a location, such as a toilet or conduit, using another substance