Country Dictionary

Advance notice of something that will need attention.

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

1. advance notice 2. a warning

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

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

Dude - Jonny's banging Daves wife! I best call him and give him a heads up!

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

Yo you got beef? Lets head 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!!*

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

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

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

That heads up round was intense