A dirty Lasse is when you where at your parents house for a while and you finally come home and have the urge to masturbate,

which results in a very quick masturbation session. The masturbation material is secondary and is to a high percentage an ugly girl or animal porn.
We better not disturb him he is pulling of a dirty Lasse.

When I am finally home it's dirty Lasse time!
by Darkmaster1422 April 15, 2020
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