A simile/idiom similar in meaning to "
one man's trash is another man's
treasure" only, in this case, it means that what is funny to
one person may be offensive to someone else.
Tom: "Man, I told this hilarious joke last night. Everyone laughed but Bob. He was a
douche and said the joke was offensive."
Dick: "
Don't worry about it,
dude. One man's LOL is another man's WTF?"