Define Heads-up Meaning

1. advance notice

2. a warning

a warning, especially of danger or the need to be alert

A term in many competitive games for 1 on 1 competition. One of its more common uses is in card games where the value of hands can change due to the number of people playing. Heads-up offers favoriable odds for high cards like aces and kings, even with sub-par kickers.

A business buzzword meaning to give somebody a summary or progress report on the current situation.
Mainly used by idiots who want to be something they're not, ie successful businessmen.

an advance notice given when a person stakes a claim to something or somewhere, often shouted as said person is running or when a group of people are given a variety of some sort.
similar to "dibs on" or "i call"

Advance notice of something that will need attention.

To give someone a warning of iminent danger, trouble or strife.

To fight someone 1 on 1 with no one else getting involved

Exclamatory warning indicating that one practice increased alertness to avoid harm from a pressing threat.

Only two players in a poker hand, typically Texas Hold 'em