The phrase "grab a cup of coffee" is a correct and usable expression in written English. You can use it when you want to talk about someone quickly getting a cup of coffee. For example, "I'm feeling exhausted, let's grab a cup of coffee before we start the meeting.".
Then maybe grab a cup of coffee afterward.
Others pace or grab a cup of coffee.
"You grab a cup of coffee, catch up with people — it's like socializing," she said.
My mother made a quick detour to a Dunkin' Donuts to grab a cup of coffee.
Now, grabbing a cup of coffee is a welcome compromise.
"Socializing in late 2008 and early 2009 meant grabbing a cup of coffee in the Treasury cafeteria," he says.
Grabbing a cup of coffee one recent morning, he scrunched up his face, straining to remember what to do.
I love the desktop app, it’s always running on my Mac. Ludwig is the best English buddy, it answers my 100 queries per day and stays cool.
Cristina Valenza
Retail Lead Linguist @ Apple Inc.