Irrelevant, moot.
Irrelevantly, off-topic.
Having little or no importance.
Of or relating to the lowest grade or level of school; junior, primary.
Little or small in size.
Of persons or their behaviour: marked by or reflective of undesirably limited interests, sympathies, or views; begrudging, selfish, small-minded; also, preoccupied with subjects having little or no importance and not mindful of broader concerns.
Secondary in importance or rank; minor, subordinate.
An outbuilding used as a lavatory; an outhouse, a privy.
A class or school for young schoolboys.