Lock in

To enter a state of heightened concentration and commitment, deliberately excluding all distractions, in order to fully dedicate oneself to a specific task or objective. This involves a focused allocation of mental and, if applicable, physical resources, aiming to optimize performance and achieve set goals.

“That girl over there said you’re hot. Lock in bro.” “I told my friend to lock in and he’s hasn’t left his computer in 3 days.”
“Locked in machine operating at maximum efficiency. (I went to the gym today)”