Pisser
jerk, idiot (crude insult; can be jokingly affectionate among friends)
Origin
Literally derived from the 'pissen' (vulgar for 'to urinate'), 'Pisser' originally means someone who pisses. Wiktionary marks the word as 'derb' (coarse) and youth-slang, listing it as an insult for a contemptible male person (akin to 'Schisser', coward). In youth slang it is sometimes softened into a jokingly matey term among friends, but it remains crude.
Building blocks
Words in this expression
Examples
Du kleiner Pisser hast mein Ladegerät !
You little jerk hid my charger!