A series of extremely audible gasoues emissions usually following a meal consisting of beans and/or an extended period of holding in saidgas for the sake of politeness.
Upon leaving the party, Fred led a five-minute fart parade. He had, after all, consumed mass quantities of beans before he arrived and could no longer contain himself.
The fart barrier is passing the point in a relationship where farting in each other's company has become accepted. Thus strengthening the relationship and bond of the couple.
I farted in front of Jules the other day! We finally made it through the fart barrier!