stiffen up
Intermediate (B1) neutral
When your body becomes hard to move or bend, especially after sitting still or being cold.
"After sitting at the desk all day, my back had completely stiffened up."
Hear it in context
No Talking About Your BUTT Holes | Brooklyn Nine-Nine
Brooklyn Nine-Nine · 0:01
my butt stiffen up.
The Insane Engineering of the V-22 Osprey
Real Engineering · 11:39
strong materials to stiffen up the structure,
Brooklyn 99 Stakeouts That Make Me Feel Like A Spy
Brooklyn Nine-Nine · 5:36
the butt holes in my butt stiffen up.
How Earthquake Bearings Work
Practical Engineering · 5:33
Let me stiffen up my building on the shake table, and I’ll show you what I mean.