loppen is the masculine singular definite of loppe.

loppeN

Kven

sonsariN; sonsaraN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:66423Edit on GitHub Suggest

lávkkisN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:30301Edit on GitHub Suggest

Case	Sg	Pl
Indef	loppe	lopper
Def	loppen / loppa	loppene