Kalmar "Bouncing Betty" yawanci tana nufin wani nau'in nakiya ne da aka kera domin ta tashi bayan an matsa masa lamba daga sama, kamar lokacin da wani ya taka ta. An kera mahakar ne domin ta yi tsalle ta tashi sama sannan ta fashe, wanda zai haifar da barna mai yawa da kuma yiyuwar asara. Sunan "Bouncing Betty" ya samo asali ne daga motsin motsi na mahakar ma'adinan da kuma amfani da sunan "Betty" a matsayin sunan sanya mata abubuwa ko mutanen da ke cikin soja.