涂鸦：

　　Graffiti(singular:graffito;thepluralisusedasamassnoun)isthenameforimagesorletteringscratched,scrawled,paintedormarkedinanymanneronproperty.Graffitiisanytypeofpublicmarkingsthatmayappearintheformsofsimplewrittenwordstoelaboratewallpaintings.Graffitihasexistedsinceancienttimes,withexamplesdatingbacktoAncientGreeceandtheRomanEmpire[1].Inmoderntimes,spraypaint,normalpaintandmarkershavebecomethemostcommonlyusedmaterials.Inmostcountries,defacingpropertywithgraffitiwithoutthepropertyowner'sconsentisconsideredvandalism,whichispunishablebylaw.Sometimesgraffitiisemployedtocommunicatesocialandpoliticalmessages.Tosome,itisanartformworthyofdisplayingalleriesandexhibitions;toothersitismerelyvandalism.Graffitihassinceevolvedintoapopcultureexistenceoftenrelatedtoundergroundhiphopmusicandb-boyingcreatingalifestylethatremainshiddenfromthegeneralpublic.[2]Graffitiisusedasagangsignaltomarkterritoryortoserveasanindicatoror"tag"forgang-relatedactivity.Thecontroversiesthatsurroundgraffiticontinuetocreatedisagreementamongstcityofficials/lawenforcementandgraffitistslookingtodisplaytheirworkinpubliclocations.Therearemanydifferenttypesandstylesofgraffitianditisarapidlydevelopingartformwhosevalueishighlycontested,beingreviledbymanyauthoritieswhilealsosubjecttoprotection,sometimeswithinthesamejurisdiction.

　　街头篮球：

　　Streetballisalessformalvariantofbasketball,playedonplaygroundsandingymnasiumsaroundtheworld.Oftenonlyonehalfofthecourtisused,butotherwisetherulesofthegameareverysimilartothoseofbasketball.Thenumberofparticipantsinagame,orarun,mayrangefromonedefenderandonepersononoffense(knownasoneonone)totwofullteamsoffiveeachasinprofessionalorcollegiatebasketball.Itiscommontohearplayerarrivingatstreetballgametocallout"next"indicatingtheyareclaimingtherighttoplayinthenextgame.

　　Streetballisaverypopulargameworldwide,[citationneeded]andsomecitiesintheUnitedStateshaveorganizedstreetballprograms,suchasmidnightbasketball.Manycitiesalsohosttheirownweekend-longstreetballtournaments.Hoop-It-UpandtheHoustonRockets'BlacktopBattlearetwoofthemostpopular.Inrecentyears,streetballhasseenanincreaseinmediaexposurethroughtelevisionshowssuchasESPN's"Streetball"and"CitySlam",aswellastravelingexhibitionssuchastheAND1MixtapeTourandBall4Real.

　　说唱,嘻哈：

　　HiphopasaculturalmovementmanifestinB-boying(breakdancing),graffitiwriting,DJingandeMCeeing–isanartisticcommitmenttoseizefreedomfromoppressivesocialconditions.ThisartisticcommitmentinherentinHipHopcultureexpressesarealityofhumantranscendencewhichwasoriginallybornoutofthecreativeimpulseandculturalimprovisationoftheoppressedAfricanAmerican,Afro-CaribbeanandLatinoAmericancommunitiesofNewYorkCity(withtheSouthBronxastheepicenter)inthelate1970s.[1][2][3][1][4]ItwasDJAfrikaBambaataathatoutlinedthefivepillarsofhip-hopculture:MCing,DJing,breaking,graffitiwriting,andknowledge.[5][6][7][8]Otherelementsincludebeatboxing,hiphopfashion,andslang.SincefirstemergingintheBronx,thelifestyleofhiphopculturehasspreadaround