Synset

having or showing an ignoble lack of honor or morality
<adj.all>   freq. cnt.: 3 freq. cnt.: 3

base

mean

meanspirited

sample sentences

"that liberal obedience without which your army would be a base rabble"- Edmund Burke
"taking a mean advantage"
"chok'd with ambition of the meaner sort"- Shakespeare
"something essentially vulgar and meanspirited in politics"