Suck it up

[Britney]

To endure a period of mental, physical, or emotional hardship with no complaining.

[Little_Girl]

To cope with something unpleasant without complaining--usually because you have no choice.

Supposed to be pilot slang. If you vomit into your mask, youd better suck it up. Otherwise, you can inhale it and die.

[Tanya Shivari]

Quit whining, suck it up and drive on. Military slang meaning to just deal with it and quit complaining

[Mark Zuckerberg]

To prepare ones self to put forth greater effort in overcoming an obstacle (of any type; physical, mental, etc.)
origin - (probably military drill sergeants) preparing for any strenuous physical task invariably requires fully engaging the stomach muscles and the more overweight the person the more it manifests visually as sucking up the stomach.

[Little_Girl]

A term most commonly used by amateur doctors to relieve themselves of the work required to cure injured patients.

[Donald Trump]

A harsh term friends say to their friends so that they can feel superior and get their fragile friends to do whatever theyre told. This is extremely annoying and hurts people deep down inside so it shouldnt be used unless you know it doesnt hurt them.

[Justin Bieber]

This is a alcohol drinking game, which requires two things, a in n out water cup (with the lines around it) and alcohol(preferably goldschlager) So you pour your alcohol in the cup. and amongst your friends you play rock paper scissors to see who has to suck it up. For every line on the cup the losing person takes that much alcohol, and for the big ones then the loser gets fucked. Chase it down with french fries, water, and soda.