The act of either inflating your expense reports to the point of absurdity or other nefarious activities like bringing a coupon to a corporate lunch and trying to get a rebate on what your coworkers have already paid.
"Dude, I totally got Bettied the other day at lunch. My friend offered to split the check but he had 3 drinks and I had water!"
"OMG I had so much time to kill on Friday so I Bettied up my expense reports and made like 100 bucks extra!!"
Prices shown in USD.