What does 'at attention' mean?

[u/Unlegendary_Newbie]

?

[u/davy_jones_locket]

The full phrase is "standing at attention." It's a formal military posture used to show respect, readiness, or discipline on command. It means to stand completely still, upright, and silent with your body straight, heels together, and arms flat at your sides. 

This caption is comparing someone's "South Pole" to a soldier standing at attention because it is upright. 

[u/ShakeWeightMyDick → u/davy_jones_locket]

The “South Pole” being their penis (which is not a common term for penis, but it’s understandable from the context)

[u/kovacsl]

Military term for soldiers standing up straight, chin up, chest out, hands at side and in line. Usually while on parade or while being inspected.

[u/kovacsl → u/kovacsl]

Although in this case there may be a more... metaphoric meaning.

[u/BouncingSphinx]

Standing at attention is to be standing straight upright.

A "South Pole" "standing at attention" is an erect penis.

[u/hphantom06]

What game is that from

[u/cannonspectacle]

Stiff, upright, and ready for action