How to say "Hit On" Someone in Australian.
Crack onto. Hit onto. Crack onto. Hit on. Now you try.
For example, you might say, "I tried to crack onto her, but she wouldn't have a bar of me. She thought I was a ratbag and told me to rack off." Rack off means go away and ratbag means scoundrel. You might also say, "I tried to crack onto her but she wouldn't have a bar of me, so I cracked onto her friend and I scored."
And that's how you say hit on in Australian.