A Sina
A Sina is a guy who’s so kind, he’d give you his last dollar and still say it was worth it.
Your friend drops his phone in a puddle and Sina gives him his own phone. 'That’s a Sina!'
Sina helps you with your homework and doesn’t even ask for anything in return. 'He’s a Sina!'
Sina stands up for you when someone says something rude. 'That’s a Sina!'