2) baby talk for the male genitals (aka a PENIS)
3) an insult used by pre-schoolers
2) Pre-schooler 1: I'll show you my weenie if you show me yours.
Pre-schooler 2: Ok, one, two, three
Teacher: CHILDREN! STOP THIS AT ONCE!
3) Pre-schooler 1: Nanapoopoo you're a weenie!
Pre-schooler 2: waaa pre-schooler 1 called me a weenie!
Stephanie isn't a weenie; she texted her crush last night.
Sometimes used in an endearing fashion.
2. (n) A psrson given to social maladroitness or embarrassing behavior.
2. "She seemed to like him, but he never said anything. What a weenie."