What does SYDLM mean?

Shut your dirty little mouth

SYDLM

Other definitions of SYDLM:

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How to use the term SYDLM:

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More slang terms:

IDW2N

IDW2N

i don't want to know

GHB

GHB

Gamma Hydroxybutyrate

DFWM

DFWM

Don't f**k with Me