This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Present participle of slick.

n. A narrow vein of ore.

n. A whipping with a hickory switch.

n. The act or process of smoothing.

n. Narrow veins of ore.

"The boys resorted to all sorts of tactics to avoid the dreaded haircut, such as slicking their hair back with Vaseline to make it appear shorter."

slick