The inadvertent co-mingling of two or more unique mixtures of gases, i.e., farts, expelled via the recta of two or more individuals, respectively. Generally considered deplorable as another's fart is traditionally considered inimical to one's own.
Somewhere and sometime between our elevator ride from the 9th to the 90th floor, our conflatulence invited the disappointment, and indeed scorn, of the purists among us. This conflatulence was both redolent of and offered new insight into Cole Porter's lament, "Down in the Dumps on the 90th Floor."
Gaseous emissions offered in appreciation or praise, usually due to a significant accomplishment on the part of the conflatulationee. Emissions may proceed from any oriface. Adjective form "conflatulatory" is also valid.
The guys at the bar offered their sincere conflatulations to Edgar after he won the chili dog eating contest.