Perhaps from or related to Old Norse nosi (“stallion's genitals”).

nosse c (singular definite nossen, plural indefinite nosser)

1. (slang, chiefly plural) testicle

• testikel c
• klunke c

nosse (imperative nos, infinitive at nosse, present tense nosser, past tense nossede, perfect tense nosset)

1. mess around, fuck up

• “nosse” in Den Danske Ordbog
• “nosse” in Ordbog over det danske Sprog

• (Classical Latin) IPA^(key): [ˈnoːs.sɛ]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈnɔs.se]

nōsse

1. alternative form of nōvisse, perfect active infinitive of nōscō
   • c. 84 BCE – 54 BCE, Catullus, Carmina 72.1:

     Dicebas quondam solum te nosse Catullum, […]

     You once used to say that you only ever slept with Catullus, […]

nosse

1. alternative form of nose

Borrowed from English nurse.

nosse f (plural nosses)

1. (Jersey) nurse