One who figuratively or actually uses their tongue to insert into others anal regions and samples. A known shit-talker or other undesirable. Basically designed to apply to a plethora of instances where one requires a unique term with which to define one or more persons known to be a pain in the ass.
"Dude, I'm not watching American Idol... those contestants are a bunch of ass tasters!" Hey, did you see what that ass taster just did?" "No, we're not going out anymore... he was such an ass taster."
by Bowlfinger '72 January 18, 2012