slew, slue

Slew or slew is the past tense ( yesterday, or some time ago ) of "slay", meaning to kill--
"When David slew Goliath, that was a miracle..."
Remember the old tale of the tailor who slew seven with one blow? 

Slue or slue ( rhymes with slew ) means to swing or turn around, particularly the mast of a ship--
Slue the mast to windward, or we'll never win the race.
Don't slue that mast without warning us first.

Now that you know that, you can say--
"Be careful when you slue the mast; it slew one of our sailors last year."

Note--"slues" ( slooze ) is the third person singular ( he she it ) of "slue" --
Watch your head when it slues!
Not to be confused with "sluice" ( slooss ), meaning a channel used for conducting water, as to power a mill--
Open the sluice gate and start the mill wheel.