heads-up 

1. advance notice

2. a warning

Just wanted to give you a heads up so you'll be expecting his call.

heads-up by mandingoe January 18, 2005

heads-up 

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

Heads-up. There's a situation out there.

heads-up by The Return of Light Joker December 30, 2010

heads-up 

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.

I went heads-up with Tyler and beat him with a boat on the river.

heads-up by Lezard Valeth May 13, 2004

heads-up 

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.

Let me give you a heads-up on the current state of play.

heads-up by Ian Chode August 12, 2004

heads-up 

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"

sibling (to sibling)"i got heads up on
the passenger side"

jerry (to group) "i got heads up on the green m&m's"

gord (to friends) "i got heads up on the Playstation"

heads-up by grant dubya July 14, 2005

heads up

Advance notice of something that will need attention.

Just a heads up that the customer is likely to escalate this problem...

heads up by AKG September 20, 2005

heads up

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

Dorm Resident #1: Is that an M-80 in the toilet?

Dorm Resident #2: Heads up!!!!

*BOOOM!!*

heads up by kwashia March 28, 2005