Head up

Something said to someone meaning that they should not be ashamed of anything or that they shouldn't be sad. It means that they should not stare at the ground in despair but rather pick their head up and stand tall.

Jim: John, why are you so sad?
John: I fucked Sally Parker and she's pregnant.
Jim: Sally Parker?! She's hot as fuck. Head up.

Jim: We just lost the state championship. I am so sad.
John: You guys are a great team and came a long way. Head up.

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

1. advance notice

2. a warning

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

a heads up

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!

head up

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

Yo you got beef? Lets head up

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

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

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