At a push
Definition 1 of 1
Pro Tip 1/3Figurative Use
Often used figuratively to suggest doing something is possible with extra effort or in a tight situation. 
We can finish the project today, at a push.
Pro Tip 2/3Casual Tone
'At a push' is typically used in informal conversations rather than formal or written English. 
I could binge-watch the entire season tonight, at a push.
Pro Tip 3/3Subtle Nuance
The phrase implies a reluctance or acknowledgment of difficulty; it's not the preferred option. 
We could hike to the peak at a push, but it might be risky.