1.a person who is deemed to be despicable or contemptible;
only a rotter would do that
2.a disreputable vagrant;
a homeless tramp
3.person who does no work;
a lazy bum
4.the fleshy part of the human body that you sit on;
he deserves a good kick in the butt
5.of very poor quality
1.ask for and get free; be a parasite
2.be lazy or idle;
Her son is just bumming around all day