だもんで

expression

because; so; therefore

Casual conjunction used mainly in spoken Japanese, often to explain a reason or result. Equivalent to だから or なので in standard Japanese.

• 雨あめが降ふってるだもんで、傘かさを持もって行いくよ。

  It's raining, so I'll take an umbrella.

• 昨日きのうは忙いそがしかっただもんで、連れん絡らくできなかった。

  I was busy yesterday, so I couldn't get in touch.