You really have no idea what Americans do or do not understand, Pops. It's fascinating to me that so many people who live elsewhere think they understand Americans, when in fact their understanding of this country and the people who live here is extremely superficial and based largely on stereotypes. Making generalizations about three hundred million people, a population that is among the most heterogeneous of any large nation, can make a person look pretty foolish. I believe you're a fairly intelligent fellow, Pops, but you don't know nearly as much about us as you believe you do.
I can only speak for myself, being a 'foreigner', that your comment did not spell humour to me, dry or otherwise; sorry. Humour is a strange, fragile and fickle phenomenon in the best of circumstances, and in the limited scope of the few comments we can make, it is virtually impossible to understand the true meaning behind any of the comments that we make. Some of the time, for me, you have showed flashes of a brilliant sense of humour.
... are you serious, Popolov, that you don't know know what "shitting someone" means? English is not my mother tongue (nor my father's, for that matter), but I know. Are you just making a feeble joke? In the words of Fyi_0: FAILED. (sorry for the quote, Fyi_0)