stop-and-drop bomb
n.β Β«So he began looking down a series of alleys perpendicular to a main road. Turning down one of them, his driver struck a roadway bomb, the kind soldiers call βspeed bumpsβ or βstop-and dropβ bombs because theyβre laid down in the street like sandbags. βThe driver of the Bradley we were looking for couldnβt back up, either, because there was another speed bump,β Rodriguez saidΒ» ββ3 soldiers get Silver Stars” by Gina Cavallaro in Baghdad, Iraq Army Times Feb. 14, 2008. (source: Double-Tongued Dictionary)