What is the meaning of Og?

Initialism of own goal.

indefinite indirect marker for nouns other than personal names.

refers to motion towards an indefinite location:

refers to accompaniment with an indefinite partner or object: with a

refers to an indefinite tool or instrument used for doing: with, through, by

shows relation between two grammatical parts:

  1. preceding infinitives

    preceding infinitives

    with adjectives of manner

    after ayaw (don't)

    having, possessing as an attribute:

    and

    also

    and

    water

    and

    and

    egg

    testicle

    and

    Romanization of 𐍉𐌲

    and

    Source: wiktionary.org