Cleaning Carpets for Easter, Jbeil, Lebanon, 2009
Religions have their little secret handshakes. In Lebanon, for example, everybody peppers their language with various expressions that include God—"subhan Allah, ya Allah!, insh'Allah, hamd'illah," and so on. However, only Muslims will greet you with a "Salaam aleikum," to which the proper response is "wa aleikum assalaam, wa rahmatullah wa barakati," which says that you're in the club too. A Christian would probably reply just with a "Marhaba."
Buddhists—at least online ones—have their little flourishes too. For some reason, I find them a bit affected, sometimes even irritating. You know, things like "gassho" and _/|\_ and "metta" and referring to people as "sentient beings" and wishing "liberation" on them. Perhaps they only give me a rash because I don't feel like a fully-credentialed member of the club yet. Or perhaps they really are affected. Some people do manage to wear them well, but they're a pretty small minority.
One little flourish that has particularly irritated me—probably because it sounds similar to "I'm praying for you" or what not, which often has an awfully covert-aggressive, sanctimonious air—is dedication of merit. See, in Mahayana Buddhism we're not supposed to be practicing for our own sake, but in order to liberate all beings. There's a traditional belief that practice produces merit—kusala karma—that will mature as spiritual growth or, depending on your metaphysicals, a felicitious rebirth. However, this is only supposed to work if we practice selflessly. Otherwise, no merit, and the whole thing is wasted.