self esteem is how u feel about urself. low self-esteem is when u dont like urself, or u feel bad about urself.
thats one reason ppl make fun of other ppl, b/c they have low self-esteem
many shy ppl can have low self-esteem; thus that can be a reason why they're so shy.
some ppl make fun of certain ppl and mess with them a lot, b/c they have low-self esteem..b/c they feel bad about themselves, or they have something they dont like about themselves, so they make fun of someone and when they get other ppl laughing they feel better about themselves, or they feel good that they got something out of that person.