Slick

astuto

(clever, making an apparently hard task easy)

elegante

(appearing expensive or sophisticated)

hábil

(superficially convincing but actually untrustworthy)

ingenioso pero insubstancial

(superficially convincing but actually untrustworthy)

labioso

(superficially convincing but actually untrustworthy)

liso

(superficially convincing but actually untrustworthy)

pulido

(appearing expensive or sophisticated)

que tiene mucha labia

(superficially convincing but actually untrustworthy)

resbaladizo

(slippery due to a covering of liquid)

sofisticado

(appearing expensive or sophisticated)

marea negra

(covering of liquid, particularly oil)

neumático liso

(tire with a smooth surface instead of a tread pattern)