Opportuniwhore 

Anyone who takes full advantage and abuses a situation in order to benefit only themselves.

Carly: Can you believe Jack took his secretary to my company's ski day when I was sick?

Adelle: He is such an opportuniwhore.

Opportuniwhore by whateversosueme February 13, 2013

opportunivore 

An individual who seeks food in any situation where no exchange of capital is needed, e.g., dumpster diving or crashing a wedding buffet

As an opportunivore, Lance preferred sponging off of friends rather than braving the cold, wet dumpsters.

opportunivore by Dr. Octopus December 18, 2002

opportunivore 

Someone who selfishly exploits or takes full advantage of any situation involving free food or items.

The opportunistic omnivores in the office will eat anything we leave unattended in the kitchen, and now those opportunivores have eaten all the Christmas cookies.

That opportunistic jerk took all the free condoms from the clinic, they're such an opportunivore.

opportunivore by Knickerbøcker November 30, 2009

opportunivore 

Someone following the "high-everything diet", i.e. high-fat, high-carb, and high-protein, without any restriction on calories or macro-nutrient ratios. Could be a competitive eater, big body-builder, or just a normal person who will eat anything.

An opportunivore will eat whatever is available.

opportunivore by rensielk March 27, 2009