To crack on
British SlangDefinition
To proceed or get on with something, often briskly; also, to pursue or flirt with someone romantically.
Examples
"We’ve got loads to do before the boss gets back, so let’s crack on."
"The meeting overran, but I cracked on with the report and had it finished by teatime."
"After the recoupling, he decided to crack on with Jess and see if there was a spark."