Arctic Monkeys are pretty good, not really the same style as Modest Mouse but if you like one you'll probably like the other.
Cursive is pretty interesting, kind of offbeat and experimental like Mouse, download Art is Hard by them, damn good song.
Citizen Cope if you don't have them yet. Great slow, chill band. Same with Dispatch.
Only other things I have like that are the Pixies and Arcade Fire, both pretty good.
Egg beater that shit to loosen it up.
Dude, when your penis is in danger you need to fucking do something, Jesus.