To furnish (a container, etc.) with a tap (noun etymology 1, noun sense 2.2) so that liquid can be drawn. • To draw off (a liquid) from a container or other source; also, to draw off a liquid from (a container or other source). • To drain off fluid from (a person or a body cavity) by paracentesis. • To break into or open up (a thing) so as to obtain something; to exploit, to penetrate; tap into. • To deplete (something); to tap out. • To ask or beg for (something) to be given for free; to cadge, to scrounge; also, to ask or beg (someone) to give something for free. • To connect a listening and/or recording device to (a communication cable or device) in order to listen in secretly on telephone calls or other communications; also, to secretly listen in on and/or record (a telephone call or other communication). • To turn over (a playing card or playing piece) to remind players that it has already been used in that round. • To force (an opponent) to place all their poker chips in the pot (that is, to go all in) by wagering all of one's own chips. • To remove a taproot from (a plant). • To cut an internal screw thread in (a hole); also, to cut (an internal screw thread) in a hole, or to create an internally threaded hole in (something). • To cut an external screw thread into (a bolt or rod) to create a screw. • To put (a screw or other object) in or through another thing. • To act as a tapster; to draw an alcoholic beverage from a container. • To spend money, etc., freely.