1 RIP Johnny Hart.  He was one of the true greats.
And clams have scruples, too.

2 BC and The Wizard of Id were never my favorites growing up; even as a young duckling my tastes ran more towards Mad Magazine and Peanuts... not to mention The Adventures of Tintin.

But every now and again, Johnny Hart would bring up something that would stick in my memory.  There was one where BC is seen walking past The Cute Chick, his hands and arms waving madly down at his sides.  When she asks... Peter? I think it was, "What's with the hands?", he says BC fell out of a tree and tore his clothes off.  WHY that stuck in my brain is entirely beyond me. 

"Clams got legs!" was another one.  And to this day, I call the animal with a long nose that feasts on ants the "Eatanter."

I'll even throw out a "Zot!" once in a while.

3

I learned "Zorch" from B.C. I still use it to this day, when appropriate.

Also, "I am an Apteryx, a flightless bird with hairy feathers."

4 B.C. had my favorite baseball jokes:

Wiley:  Ok, Thor; I want you to go out there and get on base.

Thor:  You want me to bunt or swing away?

Wiley:  I want you to stick your head in front of the catcher's mitt!

5 One of the nicest things, that made me a fan forever, was that long after it became seriously politically incorrect he never changed the names of the two women. They were always "The Fat Broad" and "The Cute One".

6 "War is Heck", a sign saying "Protest" and the Fat Broad saying it's just a fad, a turtle flying and fear of the word "Gronk".  Some classics.
My father collected the trades, so I've actually read nearly everything from the mid-60s to the mid-80s.  The man was always brilliant at skewering the stupidity in the culture, but with a broad wit and subtlety. 
Oh, and "The King is a FINK!".

7

I remember one with the girls marching with signs that said, "Women Suffrage Now!".

And one of the guys yelled at them, "So suffer!"

8 Ah, one of the classics:

One caveman has a sign "Garage Sale!".  He asks another caveman what he thinks about the sale.

The reply?  "You left out the 'b'!"

9 A variation when B.C. overheard two female clams walking: Clams got gams!

10 "The king is a FINK!"

Sir Rodney yells "Halt or I'll shoot!" and after a short pause, throws a spear.  He then yells "Got him!".

The wizard then says "Good thing he halted."