P.T.F.A. RETARD(S)
A P. T. F. A. RETARD(S) is someone who won't stop being dumb, even when it's obvious they're just being lazy.
He kept saying 'I didn't know the answer' even though I explained it step by step.
She kept saying 'I didn't know the test was today' even though I told her 3 times.
He acted like he didn't know the question even though it was on the board the whole time.