woofa gas means: It was originally an urban contractaction to “…worth gas”. However, it now refers to a station that doesn’t accept credit cards to “pay at pump” transactions. You must pay in person. Not all woofa stations accept credit cards. Many gas stations accept credit cards and allow customers to pay at their pumps. Woofa stations tend to be generic, independents that don’t display any brands. (in Community Dictionary, added by Tucker Pitts)