Mannie means: Scottish dialect term for a man, with two related but distinct uses: as a general term for any man or male person, and - with a slightly diminutive or dismissive edge - for an undersized, weak,. It is a dialectal or regional word and rarely appears in mainstream teen culture; usage usually points to a family, regional, or literary source rather than peer slang. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour.