a hooker. A woman who has sex with most of the male population in any and every town.
Damn that girl is such a gum chewer.
You are not leaving this house dressed like a gum chewer young lady!
A hot girl between the ages of 20 and 30 who chews gum with a stupid, vacant look on her face and is somewhat promiscuous.
A girl need not be chewing gum to be labeled a gum chewer, but must look so stupid that one could imagine her chewing it in the manner described above.
That hot little bitty over there is such a gum chewer.