From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
lock up /lˈɒk ˈʌp/
jdn. (wegen etw.) einsperren, einbuchten, einkassieren <v, trans> [ugs.]
Note: in Gefängnis stecken
Synonyms: send down, bang up, send up, book, lag sb.
see: locking up, sending down, banging up, sending up, booking, lagging, locked up, sent down, banged up, sent up, booked, lagged