A girl + a little more, but not quite chubby
Did you say what's up to the foundation?
Are you meeting up with the foundation tonight?
Have you eaten some foundation tonight?
1: 10 minutes after a joke is told) ohhh, I get it now
2: ha! you're so foundy/foundation!
actions like those of a stupid person
1: (falls over a chair or something)
2: omg that is so foundy/foundation!