A portmanteau of the abbreviation LA, for Liberal Arts, and 'tard. Pronounced "lay-tard", LAtard is a pejorative term for a person studied in the Arts and Humanities. They typically believe themselves to be more "cultured", "creative", "open-minded", and "erudite" than most people but lack the skills to work a basic calculator, let alone engineer a bridge.
P1: whoa!! What is that putrid smell? Don't you smell that?
P2: yeah, sorry my stomach is doing weird things from that big glass of whole milk I had.
P1: what the heck, aren't you lactose intolerant?
P2: yeah, sorry.
P1: lactard.
A person who cannot consume dairy products without getting terribly ill. Symptoms: extreme bloating, pain, becoming farty, and sometimes even nauseous.
"Would you like a piece of cheese cake, Chan?"
"No way Mioshi, I'm a lactard!"
"How about we serve kugels and blintzes?"
"Um, I'm pretty sure Nikki's a vegan and Padma's pretty lactarded. It's probably not a good idea. How about latkes and knishes?"