Teacher: Not right now.
Student: Man, you is fuckin' ignorant!
1. Having the lack of knowledge, or background/factual information of a particular thing in general. However, the effect in which this person will be proceeding with their "unproven knowledge" imbedded in their mind as if factual information, they, in turn, will plan on using it in the future to make false and incorrect statements based on what they didn't know about the particular thing, or may have heard as a majority of votes for.
And being ignorant does not mean stupid. There's a big difference between the two words.
2. Derek walked up to Shavam, noticing that he looked like he was from India, and asks him, "Are you Indian?" Shavam replies, "Yes." Derek then asks, "Say somethin' Indian." Shavam, confused, walks off. Kaitie, who was watching the whole conversation, walks up to Derek and tells him he is ignorant because of what he said.
3. Rebecca turned on a lamp and the bulb went out, so she went to get a new lightbulb, leaving the lamp switched to "ON". Freddy, her ignorant little brother, saw the bulbless lamp, and wondered what would happen if he stuck his finger in the lightbulb socket of the lamp, not knowing that he would get shocked.
Smart Person: Taco bell isn't spanish food, it's supposed to be Mexican food, and it's just sloppy fast food, if you want real mexican food check out a family owned resturant.
black man: Maybe if you stop acting like a niggah then maybe people won't have to treat you like one. You can't blame the white man for nothing because he did'nt tell you to drop out of school like a dumbass and go out on the corner and sell dope. The white man didn't tell you to go rob and kill up one another so you can end up in jail. That is the choice that you made so you can't blame the white man for shit because half of ya'll ignorant ass niggahs don't even vote when it comes to election day and then you wonder why times is so hard because you bring it upon yourself.