(Roman mythology) Dionysus, the Greek god of wine and vivid social gatherings.

A person born in the postwar years (generally considered in the United States and other Allied countries as between 1946 and the early 1960s), when there was a marked increase in birthrates throughout the Western world following the return of servicemen at the end of World War II.

(music) when bass strings are slapped rather plucked individually.

(aerial freestyle skiing) a faulty landing, whereby the skier rotates backwards around the knee-joint and hits the snow of the landing slope with their back and head, before rising off the snow back into position with their skis underneath them.

(transitive) To reverse (a vehicle) from a confined space. / (intransitive) To withdraw from something one has agreed to do. / (transitive) To dare (someone) to not withdraw from a challenge.

(American football) An offensive back whose primary job is to be the ballcarrier.

present participle of run back

(American football) A player for the team in possession of the ball who lines up behind the line of scrimmage at the start of a play.

Any of various rod-shaped, spore-forming aerobic bacteria in the genus Bacillus, some of which cause disease. / Any bacilliform (rod-shaped) bacterium.

(informal) A beauty treatment for men in which hair is removed from the back, from between the buttocks ("crack") and from the scrotum ("sack").