Look at post #98.
The Guardian is a notably left-wing newspaper in England. They start off with an anti-Trump bias from the get-go.
The Google (also liberal) definition is of the "noun" schlong. which is not the same word Trump used.
The word Trump used is a "verb"--schlonged. The definitions are varied but none are obscene. As Trump relates, NPR's Neal Conan had once used the phrase to refer to the trouncing at the polls that the Walter Mondale-Geraldine Ferraro presidential ticket received in the 1984 election.
If it is okay for a liberal reporter from NPR to use as an innocuous term for "trouncing" in an election and there was no uproar back then, then Trump can use it now in referring to Hillary being "schlonged" or trounced in the 2008 democRAT primary by Obama.
Much to do about nothing except from the liberal media and the anti-Trump forces. He will rise in the polls again for slapping political correctness and Hillary in the butt.