technical tap

== English == === Etymology === The phrase became popular in the Second Industrial Revolution, when sometimes vacuum tubes or soldered connections would become loose. === Noun === technical tap (plural technical taps) A tap or a slap on a device in a way to either make it work correctly again, or break it completely. For example, hitting a TV to get its reception back, or hitting a jukebox back to life. ==== Synonyms ==== percussive maintenance