Flatulence produced when air escapes your
anus at the same time as a solid object. Although usually associated with that high pitched fart that comes out as you take a huge
dump, it is also much like what results from air being forced up your
anus while participating in anal sex.
The headboard thumping and the quiet tweetering on the other side of the
wall could only mean one thing:
anal sex.
The soft tweeters in the bathroom were a sure sign that the
one working stall was occupied.