Alternative form of one-on-one

Alternative form of A1

The number one (1). / (Internet slang, leetspeak, sarcastic) Deliberate misspelling of !, imitating someone who is too excited to consistently press the shift key while typing exclamation marks.

(sports, skateboarding, snowboarding, skiing) Clipping of 180. (180° spin)

Alternative spelling of A1

(US, military, historical) Cox-Klemin A-1 Air Ambulance, never mass produced. / (US, military) Skyraider single engine general-purpose attack aircraft.

(Internet slang) Used to signify agreement with the comment to which one is replying.

Alternative form of plus one

To a high degree.

(US, colloquial) First class, superior.