ha svart belte i

see:Se: beltebelt · seat belt · track (of a tracked vehicle)

ha nådd et høyt nivå i (en viss kampsport) to have reached a high level in (a particular martial art) Eng. phraseto have a black belt in
i overført betydning, ironisk: være spesielt flink til figuratively, ironically: to be especially good at Eng. phraseto have a black belt in
- han har svart belte i shopping he has a black belt in shopping