An idiot, stupid person, someone who screws up a lot
"Can you believe she couldn't even do that right? It was so easy, what a sillyhead"
by ihaterice August 07, 2015
a term of endearment used to describe a loved one who is acting less than normal.
friends who like to act goofy around me are described by me as silly heads.
by BNM June 10, 2006
We wrote "SHITHEAD" on the door, then rubbed part of the word out. It ended up looking like "SILLYHEAD".
by Dan Teh Man July 01, 2004