든 먹다

eat anything at all

"-든(지)" after a question word turns it into "whatever, no matter what", and with 먹다 that gives "eat anything". Most lines here are 뭐든 먹다: I could eat anything with this pot rice, they'll eat anything, these guys eat anything, I'll take whatever's left. It is used both as praise for someone who isn't fussy and, in one line, about the cost of eating anything at all doubling. One line has 언제든 먹다 "eat any time", showing the ending attaches to other question words too.

Register: casual