få ut fingeren
Literally få (“get”) + ut (“out”) + fingeren (“the finger”); "get the finger out (from wherever it is stuck/lodged)". The term implies that the individual refrains from action because his or her finger is lodged in the anus; thus, sometimes the expanded form is applied, få ut fingeren av ræva (“get the finger out of the ass”).
Although the phrase (especially when expanded) can be perceived as quite vulgar, it is a very commonly used phrase. The use of the full (expanded version) is relatively rarer and also more aggressive.