a good comrade that will always have your back

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

mans best friend

To have sex with a girl who's on all fours.

Sexual position. Simpler form of doggie style.

It Means Homie

variation: doggy native Bahamian colloquial term possibly derived from the 'doggy style' sex position.

penis, male sexual organ