bang
     n 1: a vigorous blow; "the sudden knock floored him"; "he took a
          bash right in his face"; "he got a bang on the head"
          [syn: {knock}, {bash}, {smash}, {belt}]
     2: a sudden very loud noise [syn: {clap}, {eruption}, {blast},
        {loud noise}]
     3: a fringe of banged hair (cut short squarely across the
        forehead)
     4: the swift release of a store of affective force; "they got a
        great bang out of it"; "what a boot!"; "he got a quick
        rush from injecting heroin"; "he does it for kicks" [syn:
        {boot}, {charge}, {rush}, {flush}, {thrill}, {kick}]
     5: a conspicuous success; "that song was his first hit and
        marked the beginning of his career"; "that new Broadway
        show is a real smasher"; "the party went with a bang"
        [syn: {hit}, {smash}, {smasher}, {strike}]
     adv : directly; "he ran bang into the pole"; "ran slap into her"
           [syn: {slap}, {slapdash}, {smack}, {bolt}]
     v 1: strike violently; "slam the ball" [syn: {slam}]
     2: to produce a sharp often metallic explosive or percussive
        sound; "One of them banged the sash of the window nearest
        my bed"
     3: close violently; "He slammed the door shut" [syn: {slam}]
     4: move noisily; "The window banged shut"; "The old man banged
        around the house"
     5: have sexual intercourse with; "This student sleeps with
        everyone in her dorm"; "Adam knew Eve"; "Were you ever
        intimate with this man?" [syn: {roll in the hay}, {love},
        {make out}, {make love}, {sleep with}, {get laid}, {have
        sex}, {know}, {do it}, {be intimate}, {have intercourse},
        {have it away}, {have it off}, {screw}, {fuck}, {jazz}, {eff},
         {hump}, {lie with}, {bed}, {have a go at it}, {get it on},
         {bonk}]
     6: leap, jerk, bang; "Bullets spanged into the trees" [syn: {spang}]
Source: WordNet® 2.0

bang 1. n. Common spoken name for `!' (ASCII 0100001), especially when
   used in pronouncing a {bang path} in spoken hackish. In {elder days}
   this was considered a CMUish usage, with MIT and Stanford hackers
   preferring {excl} or {shriek}; but the spread of Unix has carried `bang'
   with it (esp. via the term {bang path}) and it is now certainly the most
   common spoken name for `!'. Note that it is used exclusively for
   non-emphatic written `!'; one would not say "Congratulations bang"
   (except possibly for humorous purposes), but if one wanted to specify
   the exact characters `foo!' one would speak "Eff oh oh bang". See
   {shriek}, {{ASCII}}. 2. interj. An exclamation signifying roughly "I
   have achieved enlightenment!", or "The dynamite has cleared out my
   brain!" Often used to acknowledge that one has perpetrated a {thinko}
   immediately after one has been called on it.


Source: The Jargon File