1 definition by Mantis_OG

Top Definition
To act like a crazy cartoon Character. Examples: Donald Duck, Daffy Duck, Bugs Bunny, etc. To say things so off the wall they are Loontoonious.
"Did you here Mike last night, He was just loontoonious
by Mantis_OG June 17, 2013

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug