Goober

can mean multiple things
1. peanut
2. a not very smart person, or an idiot
3. a total goofball, and being funny
This word has gained lots of popularity when it appeared in a movie starring the infamous spongebob squarepants

"wow, travis is such a goofy little goober" - goofball
"man, i love goobers" - peanuts
"ong, you are such a goober" - idiot