Santa hates the summer because the heat melts elves.
Really, at this point just go the extra inch and add the 's.
"Really bored while driving from S. Carolina to CT in the rain."
Just add an apostrophe s after everything. Why? Because the lord himself told me to!
"His poo-litical allies, on the other hand, are feeling the heat."
"My friend sent me this pic from Seoul, S korea. I wish i knew what the buttons were for."