1 definition by Side Jack The Ripper
Masturbating using only one arm in a very animated fashion while laying on your side. This renders the other arm useless.
"Did you see Jer on the floor while those two chicks were getting it on?"
"Yes. Leave it to him to sidejack in public"
"Yes. Leave it to him to sidejack in public"
by Side Jack The Ripper February 28, 2011