SLINGSHOT
slingshot, sling, catapult
(noun) a plaything consisting of a Y-shaped stick with elastic between the arms; used to propel small stones
Source: WordNet® 3.1
Etymology
Noun
slingshot (plural slingshots)
(chiefly, American) A Y-shaped stick with an elastic sling between the arms used for shooting small projectiles.
(pinball) A stationary, often triangular object that launches any ball that hits its longest side back at a high force, now usually located above the flipper and between it and the inlane, with one each for both lower flippers.
Synonyms
• (stick with elastic band for shooting projectiles): bean shooter, catapult (UK), flip, hand catapult, shanghai (Australia and New Zealand)
Verb
slingshot (third-person singular simple present slingshots, present participle slingshotting, simple past and past participle slingshotted)
To move or cause to move in a manner resembling a projectile shot from a slingshot.
(especially) To use the gravity of a moving planet to add momentum to a spacecraft.
Source: Wiktionary