knuckle ball
or knuck·le·ball
noun Baseball.
a slow pitch that moves erratically toward home plate, usually delivered by holding the ball between the thumb and the knuckles of the first joints of the first two or three fingers.
Also called
knuck·ler
[nuhk-ler] /ˈnʌk lər/.
Origin of knuckle ball
An Americanism dating back to 1905–10
Words nearby knuckle ball
knub,
knubbly,
knubby,
knuck,
knuckle,
knuckle ball,
knuckle down,
knuckle joint,
knuckle pads,
knuckle sandwich,
knuckle under