WordWeb Online

1. [Brit, Cdn] Be lazy or idle
   "Her son is just arsing about around all day";
   - bum, bum around, bum about, arse around [Brit, Cdn], loaf, frig around, waste one's time, lounge around, loll, loll around, lounge about, slob [Brit]
    
2. Indulge in horseplay
   "Enough arsing about--let's get back to work!";
   - horse around, arse around [Brit, Cdn], fool around, fool

Derived forms: arsing about, arses about, arsed about

Type of: idle, jest, joke, laze, play, slug, stagnate