The anal equivalent to a tampon. For use when the possibility of anal leakage is high, or when rouge flatulence may in fact be a liquid or a near solid. See also manpon
Guy 1: What the fuck is that smell? Dude, did you just shit yourself?
Guy 2: Nope, I got a Analpon in.
I drank to much tequila last night so all day today I wore a Analpon, you know, just in case.