Does it have a name?
like you are super sleepy but you dont think well and cant walk right (walks like a drunk person)
As Torngren said exhaustion, but I know people who call it punch drunk tired.
Yeah, funny. It happens to me all the time.
Could be low iron or anaemia. You should get a blood test CBC(complete blood count for hemoglobin) and an IronB and TIBC which will check your total iron.
Exhaustion or sleep deprivation.
You probably have an inner ear problem, causing you to walk unbalanced. You will have to have medication for this or it will not get better.