"slicked" in the verb sense
1. slick, sleek
make slick or smooth
2. slick, slick down, sleek down
give a smooth and glossy appearance
"slick one's hair"
"slicked" in the adjective sense
1. plastered, slicked
of hair) made smooth by applying a sticky or glossy substance
"black hair plastered with pomade"
Source: WordNet® (An amazing lexical database of English)
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