небрежно

1) General subject: carelessly, casually, currente calamo, haphazardly (имеет отрицательную коннотацию, т.к. hazard связано с опасностью), heedlessly, in a perfunctory manner, jauntily, loose, negligently, off hand, off-handedly, offhandedly, roughly, scrawl, scribble, slovenly, slur, in a haphazard fashion, coarsely, raggedly, airily, sloppily, nonchalantly

2) Colloquial: any old how

3) Rare: sloven

4) Jargon: once over lightly

5) Business: inadvertently

6) Sakhalin energy glossary: in a slipshod fashion (работать)

7) Makarov: currente calamo (лат., букв. беглым пером)