I can't believe nobody has properly explained this.... anyway, "anthem", when used stylistically, means theme. For instance, if a venue, such as a dance club, has a contiguous design feel, it can be said that it sticks to an anthem.
Of course it can also mean a song that is used to convey underlying values, principles, spirit, commraderie, etc., eg. a national anthem.

A jack off buddy (from 'cum' /'come', meaning 'semen', and 'companion'); a friend that you get together with for sessions of solo or mutual masturbation
Variant of: cumpanion (from 'companion' & 'cum'); jack off buddy & wank bud & JO buddy
Similar to: fuck buddy

On Networking apps like Tinder, Anthem or "My Anthem" means a music track that tells your (User's) story.

The bottom of an ant's pants... according to Brittany S. Pierce

1. The most brilliant japanese band ever (Loudness fans, you don't know what you're missing =3)
3. A official song you sing with pride that's mostly patriotic-

A cheesey, cliched, highly known and recognised trance/electronic song.

A game developed by BioWare, and produced by EA, release date scheduled February 22, 2019. Possibly a new step forward in gaming as we know it (And by that I mean battle royal games are old and we need something new).