/sladh"euhr/ , Informal.
v.t.
1. to spread or apply thickly: to slather butter on toast.
2. to spread something thickly on (usually fol. by with ): to slather toast with butter.
3. to spend or use lavishly.
n.
4. Often, slathers . a generous amount: slathers of money.
5. open slather , Australian. complete freedom.
[ 1810-20, in sense "to slip, slide"; orig. uncert. ]