condiment thief

the reason why McDonald's hides ketchup and mustard behind the counter

Too cheap to buy his own the condiment thief fills her purse or his pockets with tiny portions of condiments

Condimental

When a diner overestimates the amount of condiment he requires, thus causing a large excess to be left on the plate after the meal has been consumed in its entirety.

Ben: Have you copped a load of that peng waitress?

Emile: Yeah. I was thinking of leaving my digits on this napkin for her.

Ben: Good luck. She wouldn't look twice at you given how condimental you've gone.