to harangue or address a meeting or potential customers to entice them into a premises.
The shoe store employed a spruiker during their annual sale.
Australian, pronounced 'sprook'
Using the human voice to promote an idea, goods or services to another person. Commonly refers to addressing members of the public to encourage them to enter premises, purchase goods or both.
OMG, why have you spent all your money on that shitty dress?
The guy outside the store was spruiking them.