Where does “pissbomb” come from?

pissbomb (Swedish) comes from Swedish piss, from Middle Low German pissen, from Dutch pissen, from Middle Dutch pissen, from Old French pissier, from Vulgar Latin pissiare, from Latin pissio — I piss.

Ancestry of “pissbomb”, step by step

pissbomb traces back through two separate lines of ancestry.

via Swedish piss

Step	Language	Word	Meaning
1	Swedish	piss	piss
2	Middle Low German	pissen	—
3	Dutch	pissen	to piss
4	Middle Dutch	pissen	to piss
5	Old French	pissier	to piss; to excrete urine
6	Vulgar Latin	pissiare	present active infinitive of *pīssiō
7	Latin	pissio	I piss

via Swedish bomb

Step	Language	Word	Meaning
1	Swedish	bomb	a bomb
2	French	bombé	rounded, convex; past participle of bomber
3	Italian	bomba	bomb
4	Italian	bombo	bumblebee; buzzing
5	Latin	bombus	A buzz or humming sound
6	Ancient Greek	βόμβος	any deep, hollow sound, humming, buzzing,...

Every word from Latin pissio →