Suck It O'Charley's ...umm let me explain

So last night after work, we headed over to O'Charley's because we had a gift certificate to blow and we are a very "eat-out" kind of family. (Side note: if you ever don't know what to get any of us for anything...get us restaurant gift certificates lol). Z ordered chocolate milk, mandarin oranges and a house salad with white dressing and as we were waiting, he commenced singing The Ants Go Marching One by One Hoorah, Hoorah....well in the first verse the little one stops to suck his thumb yada yada. Z gets to verse three and can't remember what the little one stops to do....so he stops and then just loudly says SUCK IT!

Now I have to admit my reaction should've been more stern, however, all I could do was laugh hysterically. Pretty soon the waiter was in on the laughing and Z thought he was just the star of his own little show and so he kept repeating the phrase. I finally calmed down and told him that wasn't a good thing to say and he didn't understand because the little one stops to SUCK his thumb...we SUCK on lemons in our tea, etc. It was really hard to try to explain to my newly-turned 4 entertainer that in that context, it was not a nice thing to say. Let's see that would be mother-failure number...oh, I don't know....this week.