I. | ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ adverb
: equally
profits shared fifty-fifty
II. adjective
1. : shared, assumed, or borne equally (as by two people)
a fifty-fifty proposition
2. : half favorable and half unfavorable
a fifty-fifty chance to live
: half pro and half con
a fifty-fifty decision