topcase
Etymology
From top + case.
topcase means synonym of trunk (“storage compartment fitted behind the seat of a motorcycle, sometimes on bycicles or other vehicules”). Lexicurio rates it Sui generis — a strength score of 85 out of 100.
noun
- Synonym of trunk (“storage compartment fitted behind the seat of a motorcycle, sometimes on bycicles or other vehicules”).“One prototype was also fitted with a combination topcase/passenger backrest, while the other sported a variation on the R1200C's flip-up setup.”