As an expression of encouragement; there you go, let's go, come on, that's it, attaboy, attagirl / expressing a certain agitation, positive or negative (eg. enthusiasm or excitement, or impatience, annoyance or frustration, etc.), sometimes overlapping with previous sense of encouragement; come on, go on

inflection of aller:
/ inflection of aller:

(idiomatic) go figure!

(formal, singular and plural) go ahead; go on

(formal or plural) how are you

(fencing) A three-command start when fencing:

(offensive, markedly vulgar) fuck you, go fuck yourself

(idiomatic, colloquial) get lost! (go away)