Definition of moby in US English:

moby

(also mobie, mobey)

noun

British
informal
  • A mobile phone.

adjective

US
slang, college slang
  • Large, great, impressive; (in Computing) complex.

Origin

1990s. From mob- + -y<br>1960s; earliest use found in Dictionary Hawthorne High Slang. Apparently shortened from the name of MobyDick; compare slightly later Moby Dick.

Pronunciation

moby

/ˈməʊbi/