An idiot can be said to someone that is just being a dickhead or if someone got an easy question wrong
Trump Is Such An Idiot
-Dude, You Cant Use The Word In The Definition
Someone who got hit with a firework
Ur an idiot if u get hit with a firework
it means stupid, retarded, no so smart, forgetful
man i am a total idiot or i forgot to buy milk im an idiot