No definitions found for 'dead-sure thing'
Perhaps one of these:
dutch rush,
dedecorate,
dutch harbor,
death's-herb,
death chair,
dedecoration,
death square,
dowitcher,
death grapple,
dutes auriga,
ditcher,
dyadic arithmetic,
diatessaron,
death grip,
dutch iris,
dodgery,
data service unit,
dodger,
datagram,
dead ground,
dedecorous,
ditch reed