It is an acronym standing for Weak Ass Little Bitch. Can be used to indicate how weak one little bitch's ass is or in the plural to highlight many bitches' asses and their weakness.
Roger: My boss is such a WALB!
Gary: What?
Roger: A Weak Ass Little Bitch!
Gary: Oh, yeah. Isn't that your dad?
Roger: Yeah, but still a WALB!
Gary: What?
Roger: A Weak Ass Little Bitch!
Gary: Oh, yeah. Isn't that your dad?
Roger: Yeah, but still a WALB!
by PLAISTOW April 19, 2011