Correct

油子

/ yóuzi / 
Strokes

Definition

dense and sticky substance/(dialect) wily old fox

Example

As a Noun

black sticky substance

1
Yāndài
烟袋
yóuzi
油子

tar inside a tobacco pipe

As a Noun

foxy/sly person

2
Lǎo
老
yóuzi
油子

foxy old hand