ˈbəm+ˌ- noun
Etymology: probably from Low German bumboot, fr bum, bōm tree + boot boat, from Middle English; akin to Old High German boum tree — more at beam , boat
: a boat that brings provisions and commodities for sale to larger ships in port or offshore
I bought a bunch of the tiny Azores bananas from a bumboat under the side — F.M.Ford
Nelson's sailors had their bumboat women who used to swarm aboard by rope's end and anchor chains — H.W.Baldwin