What's the difference between shog and shug?

Shog

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Definition:

• (n.) A shock; a jog; a violent concussion or impulse.
• (v. t.) To shake; to shock.
• (v. i.) To jog; to move on.

Example Sentences:

Shug

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Definition:

• (v. i.) To writhe the body so as to produce friction against one's clothes, as do those who have the itch.
• (v. i.) Hence, to crawl; to sneak.

Example Sentences: