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1.
1. When a man puts his hands behind his head and interlocks his fingers while receiving oral sex.

2. An act that denotes serious enjoyment, relaxation, and/or a hands-off attitude
1. She was well hidden going down on him under the table, but everyone could see his blowjob arms so we all knew what was up.

2. It was a beautiful day at the beach, school was out, he was with his boys, so he threw up the blowjob arms and watched the girls go by.
by Kellnah June 05, 2010