Chuckleheads? The last time I saw that word was in a historical document from the 1890s.
I think "chucklehead" is a great word. Hope it comes back into use.
Here's a few more 19th century words I keep in my pocket:
squirt - fire engine
skirmishers - Men looking for cheap bargains from traders on newly arriving steamboats
lip tickle - a kiss
coughing hoss - what Indians named the locomotive
chunk - slang for dinner
Trust me, chucklehead is a live and well. And, sadly, used more every day.