Definitions for run around
frolic, lark, rollick, skylark, disport, sport, cavort, gambol, frisk, romp, run around, lark about(verb)
"The children frolicked in the garden"; "the gamboling lambs in the meadows"; "The toddlers romped in the playroom"
Kernerman English Learner's Dictionary
to be busy
I'm exhausted - I've been running around all day.
To be very busy doing many different things.
to move from one end of the consist to the other, so as to pull the train in the opposite direction.