stum

Related to stum: schtum, shtum

keep stum

To remain silent; to not say anything; to avoid revealing secret or sensitive information. An alternative spelling of the more common "keep schtum/shtum." It's better to just keep stum when the boss starts flinging accusations than risk further incensing him. We'll need to keep stum about this deal for the time being.
See also: keep, stum
Farlex Dictionary of Idioms.

stum

(stəm)
1. n. marijuana. (Drugs.) This stum is cashed. Trash it.
2. Go to stumbles.

stumbles

(ˈstəmblæz)
1. and stum [st?m] and stumble-bumbles (ˈstəmblæˈbəmblæz) n. barbiturates; sedatives; tranquilizers; alcohol. (Drugs.) Kelly was shocked to find a handful of stumble-bumbles in his brother’s jeans.
2. n. the inability to stand up and walk straight. I guess I have the stumbles today. Not enough sleep, I guess.
See also: stumble

stum [st?m]

verb
See stumbles
See also: stum
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • keep stum
  • stum [st?m]
  • enquire
  • enquire about (someone or something)
  • any fule kno
  • bollix
  • bollix up
  • bollixed up
  • geesh
  • Geesh!