ass plug

Definition

Cone- or phallic-shaped object preferably no longer than 4 inches (10 cm) (to avoid causing problems to the lower intestines) flanged or handled at the bottom (to keep it from being sucked into the rectum by the anal sphincter), designed to completely fill the anus and stimulate the prostate and press against the inner vaginal wall; especially appreciated in sadomasochism.
Synonyms: anal insert; anal plug; butt plug.