This is the 14417th most frequent German word.
kiffen
To smoke cannabis.
Here, 'kiffen' is used in the past tense to describe the recreational activity of smoking cannabis.
Ich habe gestern Abend mit meinen Freunden gekifft.
I smoked weed with my friends last night.
'Kiffen' is used here to make a general statement or advice about the consequences of the action.
Man sollte nicht kiffen, wenn man fahren muss.
One should not smoke weed if one has to drive.
In this sentence, 'kiffen' is used in the past tense to describe a habitual activity.