Favoreturn 

When someone favorites a tweet of yours shortly after you favorite one of theirs. They probably only favorited your tweet as an acknowledgement of your favorite. They normally would not have clicked the favorite button for your tweet.
Note: not a genuine favorite; usually pity.
Also known as "returning the favor-ite".

"Janice favorited my tweet about the my NCAA bracket doing well? Probably just a favoreturn..."

Favoreturn by Much2MyChagrin April 7, 2013

favortunistic 

to use an opportunity in your favor.

It would be very favortunistic of you to use your company credit card to take your friends out to lunch.

favortunistic by nerdherd4173 September 28, 2010