もちのろん

adverb

of course; naturally; obviously

Slangy, playful way to say 'of course', derived from 勿論 (もちろん). Used in casual conversation among friends.

See also: もちろん

• 「明日あしたのパーティー、来くる？」「もちのろん！」

  "Are you coming to the party tomorrow?" "Of course!"

• 彼かれが手伝てつだってくれるのはもちのろんさ。

  It goes without saying that he'll help out.