goofy · adjective, noun1
From goof (“foolish and/or silly person”, noun) + -y (suffix forming adjectives with the sense form ‘having the quality of’; and forming informal nouns denoting associated persons or things).
goofy · adjective, adverb, noun2
From Goofy, the name of a Walt Disney cartoon character in the form of an anthropomorphic dog, from goofy (adjective): see etymology 1. Etymology 2, adjective sense 1 (“having crooked, especially protruding, front teeth”) refers the character’s buckteeth, while etymology 2, adjective sense 2 (“riding with one’s right foot forward”) and the corresponding adverb and noun senses refer to the character being depicted surfing in that manner in the cartoon Hawaiian Holiday (1937).
Goofy · proper noun3
From goofy.
Etymology from Wiktionary, CC BY-SA 4.0.