1) Mugway (proper noun) - The Creature of the deep, also see douche
2) mugway (noun) - a douche; something catastrophically bad.
3) mugway (verb) - to be a douche; acting in a way that lessens yourself; twatting it up.
4) mugway (adjective) - horrible, heinous, unsightly, intolerable, boring.
5) mugway (onomatopoeia) - the sound that the elusive creature of the deep's face makes.
synonymous with 'kimoi' and pretty much everything else that is shit.