Lucas is that one guy in your friend group who did something again. Common in STEM schools.
He probably is the youngest one, and calls his friends questionable nicknames.
Friend: "Oh my gosh, Lucas did it again!"
Lucas: "Haha 1984. For real."
Friend: "Lucas!"
Lucas: "Haha Nuna"
A small kid who wears a Kathmandu jacket.
Kid: What's up dude?
Luca: Don't speak to me I have a Kathmandu jacket
Lucas: A very scrumptious individual, usually haters of the word "moist" and never grows more five foot four, one of the fruitiest people you could ever come across.
"Hey who is that talking the girl over there?"...
"Well considering they just rejected him it probably a Lucas"
A word/name used to troll gullible people.
Person: Hey, have you heard of Disney’s new movie?
Gullible: Yeah, Luca?
Person: Luca deez nuts.