bug vs true bug

bug

noun
  • An insect of the order Hemiptera (the “true bugs”). 

  • A problem that needs fixing. 

  • A manually positioned marker in flight instruments. 

  • HIV. 

  • A metal clip attached to the underside of a table, etc. to hold hidden cards, as a form of cheating. 

  • A limited form of wild card in some variants of poker. 

  • An asterisk denoting an apprentice jockey's weight allowance. 

  • Any insect, arachnid, myriapod or entognath. 

  • A young apprentice jockey. 

  • A keen enthusiast or hobbyist. 

  • A concealed electronic eavesdropping or intercept device. 

  • A trilobite. 

  • A semi-automated telegraph key. 

  • An enthusiasm for something; an obsession. 

  • Any insect, arachnid, or other terrestrial arthropod that is a pest. 

  • Synonym of union bug. 

  • Any of various species of marine or freshwater crustaceans; e.g. a Moreton Bay bug, mudbug. 

  • A contagious illness, or a pathogen causing it. 

  • A small and usually invisible file (traditionally a single-pixel image) on a World Wide Web page, primarily used to track users. 

  • A small, usually transparent or translucent image placed in a corner of a television program to identify the broadcasting network or cable channel. 

  • A small piece of metal used in a slot machine to block certain winning combinations. 

verb
  • To act suspiciously or irrationally, especially in a way that annoys others. 

  • To install an electronic listening device or devices in. 

  • To annoy. 

true bug

noun
  • Any of various insects of the order Hemiptera and in particular of the suborder Heteroptera, that are wingless or have two pairs of wings, and have mouthparts adapted for piercing and sucking. 

How often have the words bug and true bug occurred in a corpus of books? (source: Google Ngram Viewer )