potty mouth

Jr. came in from recess today, very upset that Michael was saying bad words.  I have been teaching 7 year olds long enough that I know better than to take that statement at face value.  What exactly did he say?  Jr. leans close and whispers, "toilet crap," which isn't terrible, but is worth calling Michael back to have a little talk.  Michael denies saying bad words, insisting that he never, never said "toilet crap"  Well then, what DID you say?  And in the interest of full disclosure, he leans close and admits he never said a bad word, only 'holy crap.'  You see in a 7 year olds world, 'toilet crap' would be a very rude and unmentionable thing to say, but 'holy crap' is completely acceptable.