Loo, Restroom, Bathroom, Water Closet or WC, Ladies Room or Men's Room (depending on your gender), Little Boy's Room or Little Girl's Room, crapper, head, latrine.
You can also say:
"going to powder my nose,"
Some slang terms for arsonist are firebug, torch, and pyro.
Here are some slang terms for potatoes:SpudsTatersMurphyTots
fine
The slang terms I'm familiar with are: P.I. Private Eye, Peeper and Dick
Here are some examples:CarJalopyFlivverRide
No, "hopper" is not a slang term for a toilet. In some contexts, "hopper" can refer to a container used to hold materials in industrial settings, or to a device used in agriculture for spreading seeds or fertilizer.
bucksgreenbacks bills
Fabu. or Fab.
shela
Angel dust
Hoops, bangs
Some slang terms for suicide include "offing oneself," "taking one's life," "dropping out," and "doing oneself in."