packin mustard
When someone is so attractive they look like they just walked out of a hot dog stand and took a bite of the most awesome mustard ever. You call them packin' mustard because they're hot and you're jealous.
My crush just walked in. I'm packin' mustard and I'm not even wearing pants.
That guy in math class is packin' mustard. I want to lick his face.
My sister said my friend is packin' mustard. I said, 'That's my friend.' She said, 'No, that's your future.'