1
general::
Phrase(s): on the go
busy; moving about busily. • I’m usually on the go all day long. • I hate being on the go all the time.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
In constant activity, very busy, as in I'm exhausted? I've been on the go since eight this morning. [Mid1800s]
American Heritage Idioms