- The definition of wiggy is slang for someone or something wild and crazy or over the top.
An example of wiggy is Lady Gaga's fashion.
adjectivewig·gi·er, wig·gi·est Slang
Excited, eccentric, or crazy, especially in reaction to something.
From wig out
(comparative wiggier, superlative wiggiest)
wig +â€Ž -y