smarm
Concise Oxford English Dictionary © 2008 Oxford University Press:
smarm /smɑːm/ informal
▶verb
- 1 chiefly Brit. behave in an ingratiating way.
- 2 smooth down (one's hair), especially with oil or gel.
– origin C19 (orig. dial. in the sense ‘smear, bedaub’): of unknown origin.
'smarm' also found in these Oxford entries:

