anal-echo
A highly-embarrassing (or highly-AMUSING, depending on who you talk to, or on whether "high-brow" or "low-brow" company happens to be present at the time) phenomenon whereby your butt-hole decides to do its Robert Perry impersonation --- i.e., you fart at the same time as you perform some other bodily-function "upstairs", such as coughing, sneezing, wheezing, gagging, etc. Extra caution/concentration/awareness is often in order in an instance such as this, since it can be prime circumstances for an incident of orifice-outflow overload.
