2. Adverb. (US idiomatic slang) With great abandon. ¹
3. Adverb. (US idiomatic slang) At the fastest possible speed. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Balls-out
ballpen ballplayer ballplayers ballpoint ballpoint pen ballpoint pens ballpoints ballproof ballroom ballroom dance | ballroom dancing ballroom music ballrooms |