stupid or slow-witted; adjective - (Oxford English Dictionary definition) also describes one who is lacking in composure, grace, intellect, style etc.

A nick-name for one whose attributes are all of the above.
Tom: That guy is SO gormless, he really doesn't have a clue! It's actually hilarious to watch... from a distance.
Dick: Yeah, I really cant stand that guy! I'd NEVER invite him to a party.
Harry: Guys, chill, it can't be easy to wake up every morning and have to face not only the world but also yourself. Have some compassion for the dude; he's clearly got problems.

Brian: Sometimes I just feel so, so, SO gormless!
Briana: Hmm, 'gormless', rhymes with formless, chormless, hormless...
Brian: That's not helpful.
Briana: Perhaps if you thought about your words before you spoke them... hmm? After all, the definition of a gentleman IS 'one who says what they mean and means what they say'!

"The man gormlessly(<-adverb) spent his life with his proverbial foot in his mouth; always the moment killer, cringe worthy comment maker, lie starter and shit stirrer. He had made many enemies out of friends and had a lot to atone for."
by whiteymcfitey January 4, 2009
Get the gormless mug.
A dozy, vacant expression.
Oblivious to ones surroundings, mouth agape.
"Wake up you gormless twat!"
by coreyhaim May 5, 2005
Get the gormless mug.
someone who couldn't find their arse with both hands.
by me old fruity August 3, 2005
Get the gormless mug.
Entirely bereft of gorm.
The gormless marketroid didn't realize that he was being had.
by ke6isf June 27, 2005
Get the gormless mug.
A person wiv the inteligence span of a dead fish
That Ben Browns a gormless focker
by Jamie Elsworth May 1, 2005
Get the gormless mug.
based on Roald Dahl's Matilda: people who aren't dull or stupid, but arrogant and narcissistic
well if look at the current British slang definition of gormless, it certainly wouldn't describe Matilda's parents in Roald Dahl's book, so I'd say gormless should have a new and improved meaning
by Sexydimma May 24, 2016
Get the gormless mug.