“Suck it up now so you don’t/won’t have to suck it in later” is a dieting/exercise saying that has been printed on many images. “Suck it up” means to work now (through dieting and exercise). “Suck it in” means to suck in one’s breath so that tummy fat doesn’t look so bad.
 
The saying, in various forms, was popularized in 2011. “Are you ready to suck it up so you don’t have to suck it in?! Sign up for Bootcamp! http://on.fb.me/k2PFQO” was posted on Twitter by Livonia Fit Zone on May 14, 2011. “The gym is the last place I want to be today. But with only 6 days until bikini deadline do I suck it up or just suck it in?” was posted on Twitter by Elin Tough on June 27, 2011. “Secret to weightloss: Suck it up so you dont have to suck it in” was posted on Twitter by Vanity on July 25, 2011.
 
“Sarah..‘suck it up now so you dont have to suck it in later!!!!’” was posted on Twitter by Kali Pitcock on November 29, 2011. “Suck it up so someday you dont have to suck it in” was posted on Twitter by Paige Blackburn on December 15, 2011.
 
       
Twitter
Livonia Fit Zone
@FitZoneLivonia
Are you ready to suck it up so you don’t have to suck it in?! Sign up for Bootcamp! http://on.fb.me/k2PFQO
2:50 PM - 14 May 2011
     
Twitter
Elin Tough
@toughytweets
The gym is the last place I want to be today. But with only 6 days until bikini deadline do I suck it up or just suck it in?
7:38 AM - 27 Jun 2011
   
Twitter
Vanity
@V_a_n_ity
Secret to weightloss: Suck it up so you dont have to suck it in
12:25 PM - 25 Jul 2011
 
Twitter
01101011
@eternalvernal
suck it up so you don’t have to suck it in.
10:56 PM - 28 Oct 2011
   
Twitter
Danielle Engelman, INHC.
@DZE_Wellness
if you SUCK IT UP you won’t have to SUCK IT IN. Get moving be #SvelteFit !
4:08 PM - 28 Nov 2011
 
Twitter
Kacy Hoefler
@HaleYEAH05
Dont feel like working out but I better suck it up so later I dont have to suck it in.
8:45 PM - 28 Nov 2011
   
Twitter
Kali Pitcock
@Kalipitcock
Sarah..“suck it up now so you dont have to suck it in later!!!!”
5:41 PM - 29 Nov 2011
 
Twitter 
Alex Freeman
@freemaae
#gymtime Suck it up or Suck it in..
11:34 AM - 15 Dec 2011
   
Twitter
Paige Blackburn
@paigebburn
Suck it up so someday you dont have to suck it in
2:41 PM - 15 Dec 2011
   
Twitter
daddy long legs
@brittanybrosky
For everyone wanting to work out: Suck it up and someday you wont have to suck it in.
8:55 PM - 17 Dec 2011
   
Twitter
Lindsey Greene
@lynzeegreene
Suck it up and someday you won’t have to suck it in.
10:49 PM - 18 Dec 2011
     
Twitter
Courtney Pickering
@CourtneyJane7
Suck it up now and you wont have to suck it in later #fitness
9:02 PM - 19 Dec 2011
   
Twitter
Kristin Reber
@Kreber99
Suck it up now so you don’t have to suck it in later #workhard
9:15 PM - 19 Dec 2011
 
Mandjsfitness     
MAY 03 2012
SUCK IT UP AND ONE DAY YOU WON’T HAVE TO SUCK IT IN!

Fit Farm
SUCK IT UP SO YOU DON’T HAVE TO SUCK IT IN!
GOFITFARM DECEMBER 20, 2016
 
Google Books
Title Suck It Up and Someday You Won?t Have to Suck It In: Inspirational Quote Cover Journal, Diary for Men and Women to Write In, 6x9/150 Pages/Journal Paper
Author Asek Designs
Publisher CreateSpace Independent Publishing Platform, 2018
ISBN 172210788X, 9781722107888
Length 150 pages
 
Twitter
Fitness Motivation
@MotivatedFitt
Suck it up, and someday you won’t have to suck it in.
3:09 PM - 23 Aug 2018