tambo haisi kusvika ku paraffin
1: There isn't enough energy or adequate effort to accomplish a certain objective.
2: sexual frustration experienced by a woman because of a
man's microphallus.
Background
This quote is derived from how a kerosene lamp (or a paraffin lamp) will not light up if a short candle wick—which is either called
tambo,
shinda, or harani in chiShona language — doesn't get in contact with liquid fuel ("kerosene").