Someone or something whose potential greatness was not achieved.

plural of might-have-been

Alternative form of try as one may

using as much strength and effort as possible.

(informal) Possibly feasible though unconventional; plausible and previously unconsidered as a course of action.

Alternative form of so crazy it just might work

(Canada, US, slang, vulgar) A response to a situation that one thinks has no chance of ever occurring.

Alternative form of if wishes were horses, beggars would ride

(Britain) might not (negative auxiliary)

(obsolete, rare) A warrior of great strength and courage.