Today while the students were working on math and I was looking at something on the computer (part of the math program - I was doing my job), I heard a very loud, "Suck on this..."
I whipped my head around (what second grader knows that phrase???) and saw one of my students holding part of his cereal telling another friend that he should suck on the piece of cereal.
Ahhhhhhh...gotcha! Now I understand.