to have a screw loose is to be a a bit mad
"aye, he's always had a screw loose"
by BigDave26 December 11, 2006
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A person who is off his or her rocker; someone who is crazy or weird. Someone who does weird things, says crazy stuff, etc.
A few screws loose: "Jeffrey Dahmer, the American serial killer who would eat his victims, had more than his fair share of missing screws."
by FrozYo January 5, 2011
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crazy; silly; mad; lunatic; loony; insane
"She's a little loose screw for talking like that to us."
by Pawnstar June 14, 2012
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The bat and mosquito character in TMNT

Birthplace: Belfry, Transylvania
Height: 5' 5" (hanging by his talons)
Weight: 160 lbs. (with Screwloose on his back)
Favorite Sound: Blood curdling

Description
Wingnut, the clutzy, caped vampire bat, quietly hung out on his home planet Huanu. That is, until Krang destroyed it. Saved and sucked into a vortex before his planet exploded, Wingnut ended up on Earth, along with Screwloose, a levelheaded Huanu mosquito.

Furious and frantic that Krang blew up his planet, the crazed Wingnut's out to get even with Krang - or anyone else associated with the burbling brain. That makes him a perfect ally with the Turtle teens.

Despite Wingnut's bloodshot eyes, defective radar, stunted wings and oversensitive ears, he's determined to be a sewer-superhero. Even with constant training from our green teens, Wingnut's more likely to bump into a building than bust a baddie. Armed with mechanical turbo wings invented by Donatello, Wingnut flutters and putters to put the bite on the Foot Clan.
Josh:I got the wingnut and screw loose figure
Bob:same
by BiggeCheese105 June 28, 2023
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