ついでに

ついでに
adverb
while at it, incidentally, on the way
1. while at it, taking the opportunity
Doing something additional while already engaged in another activity, taking advantage of the opportunity.
ついでに()ってきて。
Pick it up while you're at it.
郵便局(ゆうびんきょく)()くついでに銀行(ぎんこう)にも()った。
I stopped by the bank while I was going to the post office.
掃除(そうじ)のついでに模様替(もようが)えもした。
While cleaning, I also rearranged the furniture.
ついでだから全部(ぜんぶ)やっちゃおう。
While we're at it, let's just do everything.

ついでに (also written as (つい)でに) is a useful adverb for expressing the idea of doing something while already engaged in another activity.

Common patterns:

  • ~のついでに: while doing ~
  • ついでだから: since we're at it
  • ついでに + request: while you're at it, please ~

This word is very common in everyday conversation and is neither particularly formal nor casual.