i think that its got something to do with the bowels ?
No. Slack and taut are opposite in meaning.
Stroll.
Loose or slack; not tense It is from Old and Middle English
From the Latin word laxus, meaning "loose"
My friend climbed on a slack rope.
Slack as in "lacking firmness" is an adjective. Slack as in the action "to slack" is a verb. Slack is also used as a noun to describe a part of a rope or a bog. A verb is a word that describes either an action (walk, run, etc), an occurrence (become, happen, etc) or state of being (stand, exist, etc).
Somatic is a word containing the Greek root "soma-", meaning body.
The word "schlaf" is pronounced "shlarf" - with a prolonged -a- sound.
"Sesquipedalian" is a long word, pertaining to such a word, or a person who uses long words. The root meaning is "a foot and a half" (in length).
The word slack has many synonyms. Notable ones include dull, easy, flimsy, sluggish, lax, leisurely, and others. Slack itself means; loose, baggy, or ineffective.
slack, loose
It means body