(simile, idiomatic, dated, Ireland) working constantly.

(programming) A loop that actively consumes CPU cycles while waiting for an event.

(idiomatic) Start working, usually in opposition to idleness. / (idiomatic) Have sex

A common flowering plant, Impatiens walleriana.

(idiomatic, chiefly US) Work or activity performed with the intention or result of occupying time, and not necessarily to accomplish something productive; routine work of low priority undertaken for the sake of avoiding idleness.

(informal) Someone who is very busy or hard-working.

I'm busy.

(simile) Very busy.

plural of busy signal

(simile, idiomatic) Very active; working constantly.