To leave a place, or a meeting, without being noticed(verb)
To remove an article of clothing(verb)
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Use "slip off" in a sentence
"I let my coat slip off my shoulders and down my arms passively and nonthreateningly as if I were the SWAT psychiatrist negotiating with the hostage-taker."
"Paula Boggins, faithful to the job Anna had given her, took the opportunity to slip off to the"
"When the Copavi finished its work, a shaken Ranji was allowed to slip off the slick, spineless back and resume his place in line."