“Nothing says ‘I mean business’ like using a shopping cart at the liquor store” is a saying that has been printed on many images. That is, the person is buying more than just a bottle.
 
“@ryaninco: Nothing says ‘I mean business’ like using a grocery cart at the liquor store” was posted on Twitter on July 20, 2012.
     
     
Twitter   
chels
@thechelsdiaz
“@ryaninco: Nothing says ‘I mean business’ like using a grocery cart at the liquor store.” this is @rholena
8:51 PM - 20 Jul 2012
 
Twitter
💰MakingMiaa 🇹🇹
@_MiaaMizzle
Nothing says ‘I mean business’ like using a grocery cart at the liquor store.
1:16 AM - 21 Jul 2012
 
Twitter
Jess Barone
@jggol12
Nothing says “I mean business” like using a cart at the liquor store.
10:51 AM - 21 Jul 2012
   
Twitter
Rhyss Wilson
@RhyssWilson
Nothing says ‘I mean business’ like using a shopping trolley at the liquor store.
4:19 AM - 22 Jul 2012
 
Twitter 
Wheeling Problems
@wheelingprobs
Nothing says ‘I mean business’ like using a grocery cart at the liquor store.
1:13 PM - 11 Dec 2012
 
Facebook 
OMG A Shot Bar
March 9, 2013 ·
Fact #159:Nothing says “I mean business” like using a cart at a liquor store.
 
Twitter
Kaitlyn Bristowe
@kaitlynbristowe
Nothing says “I mean business” like mom in a liquor store with a shopping cart
6:13 PM - 13 Sep 2013 from North Okanagan, British Columbia
 
17 December 2014, The South Peace News (High Prairie, Alberta), “The Page,” pg. A.9”
Nothing says “I mean business” like using a shopping cart at the liquor store.
   
Google Books
The Secret to Hummingbird Cake
By Celeste Fletcher McHale
Nashville, TN: Thomas Nelson
2016
Pg. 165:
“Nothing says ‘I mean business’ like a shopping cart at the liquor store, Rae,” Laine said.
 
Twitter
Dubskie
@Dubskie
Nothing says “I mean business” like using a shopping cart in a liquor store
8:25 PM - 11 May 2018