cos·ter·mon·ger 
(kŏstər-mŭng′gər, -mŏng′-)
(kŏstər-mŭng′gər, -mŏng′-)n.
Chiefly British
Chiefly British
One who sells fruit, vegetables, fish, or other goods from a cart, barrow, or stand in the streets.
[Obsolete costard-monger : COSTARD + MONGER.]