1. whiffle - Noun
2. whiffle - Verb
To waver, or shake, as if moved by gusts of wind; to shift, turn, or veer about.
To change from one opinion or course to another; to use evasions; to prevaricate; to be fickle.
To disperse with, or as with, a whiff, or puff; to scatter.
To wave or shake quickly; to cause to whiffle.
A fife or small flute.
Source: Webster's dictionaryFrom my earliest memories, it’s just my dad in the front yard and me hitting whiffle balls. Source: Internet
We did something similar, except still for playing with the whiffle ball. Source: Internet