A very special person, someone you've probley promised to be there best friend/ daughters boyfriend for over a period of time(or ever). Promised them yu would stop by and say hi when yur about 17 yrs old. A "Bestfriend" is also a very caring person who loves to make chicken pot-pie tht is delicious, when ever yu have a "bestfriend" remember to keep them close to yu and know tht they are always nice and generous no matter wat and if yu say i love you to a family member on the phone or in person maybe yu can get brownie points which are very important
Ex. Tia-Rose's mom is and always will be my bestfriend.