Ma'anar ƙamus na "harbin baya" yana nufin nau'in harbi ko bugun jini a cikin wasanni, musamman a wasan tennis, wasan tennis, badminton, da hockey na kankara, inda mai kunnawa ya bugi ƙwallon ko puck da bayan hannunsu yana fuskantar. hanyar harbin. Ana amfani da irin wannan nau'in harbin don ba abokin hamayya mamaki da harbin da ba zato ba tsammani, ko kuma a buga kwallon da ke da wuyar kai da harbin gaba. A wasu wasanni, kamar hockey na kankara, harbin bayan hannu na iya zama da wahala a aiwatar da shi daidai fiye da harbin da aka yi a gaba saboda sanya sandar da jikin ɗan wasan.