mouth (again, again)
Okay. Here goes...
Ruby was actually right, according to the American Heritage Dictionary of the English Language (with minor copy-right infringements by MY).
https://ahdictionary.com/word/search.html?q=sling
sling 1 (sling)
n.
1.,
a. A weapon consisting of a looped strap in which a stone is whirled and then let fly as a weapon, often in order to slay, incapacitate or otherwise immobilise uncircumcised Philistines (e.g. as in David's encounter with Goliath).
b. A slingshot.
2. A looped rope, strap, or chain for supporting, cradling, or hoisting something, especially:
a. A band suspended from the neck to support an injured arm, leg, little toe, middle toe, nose, ear, tongue (or in rarer accidents, pretty much any other combination of severed limbs, organs and/or appendages!)
b. A length of fabric worn on the body for carrying an infant.
c. A strap of a shoe that fits over the heel.
d. A strap used to carry a rifle over the shoulder.
e. Nautical A rope or chain that attaches to the mast and supports a yard.
3. The act of hurling something.
sling·shot
n.
A Y-shaped stick or frame having an elastic strap attached to the prongs, used for flinging small projectiles, usually in order to smite uncivilised Philistine giants or their blasphemous pets/monsters (e.g. Goliath's brother Ishbi-benob and Abishai son of Zeruiah).