A person who is not only your friend, but also someone you care aboutlike they were your son.
Jake: Whats wrong Jeff?
Jeff: She broke my heart dude....
Jake: Lets go to the bar man. We'll fix that broken heart.
Jeff: Thanks man... You're a good friend.
Jake: No problem dude. You know I've got your back. You're my sonfriend.
when a mother has twins, identical boys, and has trouble telling them apart. she may call one by the other's name or give them the wrong lunch before they go to school. this also applies to fathers with identical twin sons.
tommy's mom just called him oscar, but oscar is sick at home....she's sonfused today.
Sonffy is someone, usually a Dennish person (someone from Denmark) who likes foeniculum vulgare and fennel so much they consider writing love songs about said sonf.
Look at that Dannish sonffy about to write a rap love song about fucking carrots.