Do time
Definition 1 of 2
Pro Tip 1/3Prison Term
Refers strictly to serving jail time, not just being arrested or detained. 
After the trial, he had to do time for his involvement in the crime.
Pro Tip 2/3Legal Consequence
Used when talking about legal punishment, rather than other consequences. 
If found guilty, she might do time for her actions.
Pro Tip 3/3Idiom for Jail
'Do time' is an informal way to talk about imprisonment. 
He didn't expect to do time when he committed the crime.