suck it up

Probably a variation of the expression "suck up your chest," meaning roughly "compose yourself, bear your troubles, stand tall, and proceed."

suck it up (third-person singular simple present sucks it up, present participle sucking it up, simple past and past participle sucked it up)

1. (idiomatic) To put up with something; to deal with something, such as pain or misfortune, without complaining.
   • 2001, Ben Marcus, "Graded By My Students," Time, 8 Jan.:

     Some students suck it up and meet the challenge. Others look around wildly for someone to blame.

• (put up with something): be a man (about something), grin and bear it, lump it, push through it, take it like a man, deal with it, man up